Comparisons of related words

Read correctly, the graph plots time (the years 1900 to 2000) along the horizontal axis against the relative frequency of each word — its share of all words in the printed sample — up the vertical axis. It is essential to read these axes first, because the graph compares PROPORTIONS over time, not raw counts.

The two words are related: both 'wireless' and 'radio' name the broadcast-receiving set, so the graph is a comparison of rival terms for one referent. The comparison lies in how the two trajectories relate to each other. The data shows 'wireless' beginning high in the early decades and then declining from around 1940 onwards, while 'radio' begins low, rises sharply through the 1920s and 1930s, and remains high thereafter.

The key feature is the CROSSOVER. The two lines intersect at around 1935: this is the point at which 'radio' overtakes 'wireless' in frequency in the printed record and becomes the dominant term. The crossover is the most analytically useful feature of the comparison because it dates WHEN one form displaced the other.

Two brief cautions sharpen the reading. The graph shows the PRINTED, published record, so 'wireless' may well have persisted in speech and in older British usage after its line fell; and the data shows a pattern, not a precise statistic to be quoted as fact. Within those limits, the comparison clearly evidences the lexical replacement of 'wireless' by 'radio' across the early twentieth century.

Both graphs compare related words, but they show two DIFFERENT kinds of change, and naming that difference is the key to the task.

Graph 1 shows a clean DISPLACEMENT (lexical replacement). 'Icebox' and 'refrigerator'/'fridge' name the same thing — the cold-storage appliance — so they are rivals for one referent. The data shows 'icebox' falling steadily after around 1940 while 'refrigerator'/'fridge' rises after around 1930, the lines crossing around 1945. Because both lines move sharply and trade places, one form is replacing the other. The driver is partly technological and cultural: as literal ice-cooled boxes were superseded by electric appliances, the older word was retired with the older object, and the clipped, informal 'fridge' offered a shorter modern alternative. This is LEXICAL change.

Graph 2 shows something different: a near-synonym DIVERGENCE, or partial decline, at the GRAMMATICAL level. 'Whom' is the object form and 'who' the subject form of the same relative/interrogative pronoun, so they are grammatically related rather than rival names for a thing. Here only ONE line moves much: 'whom' declines gently while 'who' stays broadly stable and high. There is no neat crossover, because 'who' was already common and simply absorbs 'whom's object function over time. This is the SIMPLIFICATION of a case distinction — speakers increasingly use 'who' in object positions — driven by the loss of a felt-redundant, formal-sounding distinction, not by a new object needing a new word.

So the contrast is between LEXICAL displacement (Graph 1: two sharp lines crossing, one word replacing another) and GRAMMATICAL simplification (Graph 2: one form declining while a stable related form takes over its function). Reading the differing SHAPES — and naming the correct level and concept for each — is what distinguishes the two changes.

This n-gram compares two grammatically related words — 'thou' and 'you', the two halves of the Early Modern second-person pronoun system — and its value lies entirely in the RELATIONSHIP between their trajectories. Read carefully, the comparison evidences one of the great long-run movements of English: the simplification of the pronoun system from a two-way distinction to a single all-purpose 'you'.

Begin by reading the axes. The horizontal axis runs from 1500 to 1900; the vertical axis shows RELATIVE frequency — each word's share of all words in the printed sample — not raw counts. This matters, because the comparison is of changing PROPORTIONS, and treating the lines as exact tallies would misrepresent them.

Now describe the comparison as a relationship. The data shows 'thou' beginning high in the sixteenth century and then declining steeply through the seventeenth and eighteenth centuries to a low, near-flat level, while 'you' rises across the same span and remains high. Crucially, the two lines CROSS during the seventeenth century: this crossover is the point at which 'you' overtakes 'thou' in the printed record, dating the moment the older form ceased to be the dominant second-person singular. Describing both trajectories and the crossover — not just the falling line — is the heart of reading a comparison.

The explanation is grammatical. Early Modern English had a two-way system: 'thou/thee/thy' for the singular and informal or intimate, and 'you/ye' for the plural and for formal or respectful address to one person — the so-called T/V distinction. (It is worth correcting the frequent misconception here: 'thou' is the INFORMAL singular, not the formal form; its use to address God in the King James Bible reflects intimacy, not grandeur.) The steep fall of 'thou' and the dominance of 'you' tracks the LOSS of this distinction, with 'you' generalising to cover both functions. This is a SIMPLIFICATION — the language shedding a social distinction it stopped marking — and it is a neutral, systematic change, not a decline. Note too that 'you' need not rise from zero, because it was already in use for plural and formal address; it simply expanded into 'thou's territory.

A measured answer also applies the cautions of the method. The n-gram is built from PRINTED, PUBLISHED books, so it under-represents speech and dialect: 'thou' in fact survived (and survives) in some regional spoken dialects well beyond what the printed record suggests, so the crossover dates the shift in PRINT, which lags everyday speech. And the graph shows correlation and pattern — WHEN the shift happened — not its cause; the explanation that the distinction was felt as redundant is a reasoned interpretation supported by the wider history of English, not a fact read straight off the axis.

Synthesising the reading: the comparison of 'thou' and 'you' is graphical evidence for the loss of the second-person T/V distinction and the regularisation of the pronoun system to a single 'you' by around 1700. The comparison is far more revealing than either line alone — it is precisely the trade-over between a declining and a rising related form, dated by the crossover, that turns two lines into evidence of grammatical change. Read with attention to both trajectories, to the crossover, and to the limits of the printed corpus, the graph is a model instance of how comparing related words over time evidences the systematic, neutral simplification of English grammar.

These three sources, read together, evidence a single process: the DISPLACEMENT of an older term by a newer one across the twentieth century, and the broader pattern by which English replaces related words for the same referent. Organising the analysis around that process — rather than describing each source in turn — lets the extract, the graph and the table corroborate one another.

The argument begins with the comparison graph, Source B, because it charts the trade-over directly. Read with its axes in mind (time along the horizontal, RELATIVE frequency in the printed sample up the vertical, not raw counts), it compares two related words: 'wireless' and 'radio', both names for the broadcast-receiving set. The data shows 'wireless' high in the early decades and declining after around 1940, while 'radio' rises from around 1915, the two lines crossing around 1935. That crossover is the analytically crucial point: it dates WHEN 'radio' overtook 'wireless' as the dominant term in print. This is lexical replacement — one related form displacing another.

Source A anchors the OLDER form in real, datable use and so corroborates the graph. The c.1930 magazine extract — 'the family gathered round the wireless' — shows 'wireless' as the ordinary term just before the crossover the graph dates to around 1935. The extract is one lived instance, not proof of a norm, but read ALONGSIDE the graph it is consistent: at 1930 the printed record still favoured 'wireless', exactly as Source A does. Cross-referencing them this way — the graph charting the trend, the extract supplying a real example of the older form in use — is the synthesis the task rewards.

Source C, the word-table, supplies the WHY and dates the rising form. Its first-recorded dates explain the comparison in Source B: 'wireless' is recorded as a noun in the late 1800s (a British coinage), while 'radio' enters in the early 1900s (from Latin). So the graph's rising line tracks a NEWER word spreading after it entered the lexicon, and the displacement reflects a shorter, more international term — 'radio', of Latin origin and widely adopted, often associated with American usage — winning out over the older British 'wireless'. The table's entry for 'fridge' (a clipping of 'refrigerator') points to the same broad mechanism in another word family: a shorter, more informal form rising. A careful answer notes that a 'first-recorded date' is the earliest SURVIVING attestation, not the word's true birth in speech.

Synthesising all three: the sources together evidence lexical DISPLACEMENT as a mechanism of change in English. The word-table (C) dates and explains the rival forms; the comparison n-gram (B) charts the trade-over and dates the crossover to around 1935; and the dated extract (A) confirms the older form in real use just before that crossover. The change is neutral — 'wireless' was not 'lost' so much as superseded, and it persisted in speech after its printed line fell, since the n-gram records the PRINTED, published language and lags everyday usage. Triangulating the three sources compensates for the blind spots of each: the graph supplies the trend, the table the dating and origin, the extract the lived instance. Together they show that comparing related words over time is a powerful way of evidencing how one form comes to replace another in the continuous, systematic evolution of English vocabulary.

The claim is partly true and a useful starting point: comparing the changing frequencies of related words DOES make certain kinds of change unusually visible. But it overstates the case, because such comparisons reveal only WHEN forms trade places in the printed record, not why, and they show some kinds of change far more clearly than others. A balanced analysis of the sources both demonstrates the power of the method and qualifies the claim.

WHAT THE COMPARISONS REVEAL CLEARLY. Source A shows the method at its most convincing. Read with its axes understood (time against relative frequency in print, not raw counts), its first panel compares the grammatically related 'thou' and 'you': 'thou' falls steeply across 1500-1800 while 'you' rises, the lines crossing in the seventeenth century. That crossover dates the loss of the T/V distinction and the simplification of the pronoun system to a single 'you' — a grammatical change made strikingly visible by the comparison. The second panel compares the lexical rivals 'wireless' and 'radio': 'radio' rises after around 1915 while 'wireless' declines after 1940, crossing around 1935, evidencing lexical DISPLACEMENT — one word replacing another for the same referent. In both cases, the comparison reveals what no single line could: the trade-over between a declining and a rising related form, dated by a crossover. To this extent the claim is sound.

WHERE THE COMPARISON IS LESS CLEAR. Source B qualifies the claim, because not every comparison yields a neat crossover. It compares 'whom' (declining gently) with 'who' (high and broadly stable), and here only one line moves much: there is no clean crossover, because 'who' already dominated and simply absorbs 'whom's object function. This is a genuine change — the simplification of a case distinction — but the comparison shows it as a slow erosion of one form rather than a clean trade-over. The 'clearest way to see change' is therefore most persuasive for sharp displacements and less so for gradual, one-sided declines, where the comparison can even be misread as 'no real change' simply because the dominant form barely moves.

THE LIMITATIONS OF THE METHOD. Source C exposes the deeper caveats and is the strongest qualification of the claim. Its note that the corpus is built from DIGITISED PRINTED BOOKS reminds us, first, that these comparisons record the PRINTED, published, formal-skewed language: a formal word like 'whom' may look healthier than it is in speech, and 'thou' survived in spoken dialect long after its printed line fell, so a crossover dates the shift in PRINT, which lags everyday usage. Second, a 'first-recorded date' (Source C dates 'radio' to the early 1900s) is the earliest SURVIVING attestation, not the word's true birth, so the rising lines may understate how early the newer word was used. Third — and most importantly for evaluating the claim — the comparison shows CORRELATION, not cause: it tells us 'radio' overtook 'wireless' around 1935, but not WHY. The explanation (a shorter, international, Latin-derived term, often linked to American usage, winning out; or the clipping 'fridge' offering a shorter informal form) is a reasoned interpretation drawn from wider history, not a fact read off the axis. And spurious crossings can mislead: homographs, sense-change or OCR errors in old scans can make unrelated lines cross.

EVALUATION. So the claim should be qualified rather than accepted whole. Comparing related words is among the CLEAREST ways to see WHEN one form overtakes another, and it makes both grammatical simplification (Source A's 'thou'/'you'; Source B's 'whom'/'who') and lexical displacement (Source A's 'wireless'/'radio') visible and datable. But it is not simply 'the clearest way to see how English changes', for three reasons: it shows the printed record, not the living language; it reveals the timing of change, not its cause; and it works best for sharp displacements, less well for gradual one-sided declines and not at all for changes that leave frequency untouched (for instance, a word keeping its frequency while shifting meaning). The method is at its most powerful — and the claim most nearly true — when the comparison graph is TRIANGULATED with dated extracts and word-tables (as Source C provides), so that the trend, the timing, the origins and a lived instance together build an argument the graph alone could not. Used critically and in combination, comparison of related words is a genuinely illuminating method; treated as self-sufficient and authoritative, it overstates what frequency data can tell us.

Studying language change requires DATA, and the n-gram comparison of related words is one of the most accessible quantitative methods available: plot two rival forms on the same axes and watch them trade places. The sources let us test both the power and the limits of this method, and a balanced evaluation concludes that it is genuinely valuable for revealing the TIMING of large-scale lexical and grammatical shifts, but only when its considerable limitations are understood. Engaging with that methodological question is itself the AO4 demand of this task.

THE STRENGTHS OF THE COMPARISON METHOD. Source A illustrates what the method does well. By plotting two related words' relative frequencies on shared axes, it makes a CHANGE OF DOMINANCE visible and datable in a way no single text can. The 'radio'/'wireless' comparison, with its crossover around 1935, captures the moment one term overtook the other; the 'fridge'/'refrigerator' panel shows a clipping rising against its full form. The method's great strength is precisely the CROSSOVER: a single, datable turning point that summarises a long, gradual process. Because it compares related forms directly, it controls for general trends — both words are subject to the same corpus and the same era — so the RELATIVE movement between them is more informative than either line in isolation. For detecting and dating broad shifts, the method is powerful and objective in a way anecdote is not.

THE LIMITS OF THE METHOD. Yet Source A also exposes the method's weaknesses, and Source B names the deepest one. First, the data is RELATIVE frequency, not raw counts: a rising share can reflect more uses or simply fewer total words, and a crossover is a change in proportions — so quoting an n-gram as if it gave exact statistics ('radio rose by 80%') misuses it. Second, the method shows CORRELATION, not cause: the 'radio'/'wireless' crossover tells us when, not why, so the explanation (a shorter, international, Latin-derived term, often associated with American usage, displacing the older British word) is an interpretation drawn from wider history, not a reading off the graph. Third — and Source B's note about DIGITISED PRINTED BOOKS is the crucial caveat — the corpus records the printed, published, formal-skewed language: it under-represents speech and dialect, so a falling line ('wireless') may mask a word's survival in everyday use, and a crossover dates the shift in PRINT, which lags speech. Fourth, Source B's mention of possible OCR ERROR in older material warns that early data can be distorted by mis-scanned letter-forms (the long s mis-read as 'f', for instance), producing spurious frequencies. And fifth, a comparison only means 'displacement' if the words are genuinely RELATED rivals: homographs or words that change sense can produce crossings that look like displacement but are not. A 'first-recorded date' in Source B, too, is the earliest SURVIVING attestation, not the word's true birth.

WHAT THE METHOD CANNOT SHOW. A further limit is scope. Frequency comparison captures change in HOW OFTEN forms are used, but it is blind to changes that leave frequency untouched — a word keeping its frequency while shifting MEANING (semantic change), or a pronunciation change, will not appear at all. So even at its best, the method illuminates lexical and grammatical replacement, not the whole of language change.

SYNTHESIS AND EVALUATION. The method is therefore most useful when its limits are respected and when it is COMBINED with other evidence. An n-gram comparison (Source A) gains explanatory force when paired with a corpus word-table (Source B) that dates the rival forms and gives their origins, and both gain force when checked against actual texts that show the forms in real use. This triangulation — exactly the synthesis of varied sources AO5 rewards — compensates for the blind spots of frequency data: the comparison supplies the timing and the crossover, the table the dating and origin, the texts the lived context and the meaning.

In conclusion, n-gram comparisons of related words are a genuinely valuable method for studying language change: they reveal and DATE the trade-over between competing lexical and grammatical forms, controlling for general trends in a way single-line data cannot. But they are a method with defined limits — they show relative frequency in the printed, public, digitised record, reveal timing rather than cause, can be distorted by OCR and spurious crossings, and are blind to change that does not alter frequency. Used critically and in combination, rather than treated as a source of authoritative statistics or as a complete account of change, the comparison of related words is a powerful tool. The mark of sound linguistic method is precisely this awareness of what the data can and cannot tell us.