Base difficulty: Level 321 edit
Level distribution for verb (change): 22: 4 28: 1 109: 1 140: 1 162: 2 194: 1 254: 1 255: 1 309: 2 311: 1 321: 16 410: 2 415: 2 475: 5 1040: 1 1090: 1 1399: 38
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
cefr |
B1 (3 of 6) | 4200 |
Rank used = synthetic rank this tier contributes to the combined frequency rank (lower = more common).
Corpus Frequency
| Corpus | Freq (per M) | Best form | Share | Zipf rank | Forms |
|---|---|---|---|---|---|
19th_books |
6.33 | 4085 | 33% | 12255 downrated | 1 |
20th_books |
7.64 | 4492 | 33% | 8733 downrated | 2 |
wiki_math |
0.00 | — | — | — | 0 |
wiki_geography |
0.00 | — | — | — | 0 |
wiki_biology |
17.91 | 2532 | 33% | 7596 downrated | 1 |
wiki_modern_life |
0.00 | — | — | — | 0 |
wiki_arts |
11.35 | 3899 | 33% | 10000 capped | 1 |
wiki_society |
14.89 | 3113 | 33% | 9339 downrated | 1 |
wiki_linguistics |
0.00 | — | — | — | 0 |
wiki_physical_science |
0.00 | — | — | — | 0 |
wiki_history |
24.02 | 1903 | 33% | 5709 downrated | 1 |
early_modern_science |
0.00 | — | — | — | 0 |
religious_translated |
0.00 | — | — | — | 0 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
39.99 | 2591 | 33% | 2619 downrated | 4 |
eu_parliament_debates |
45.73 | 1221 | 33% | 2218 downrated | 3 |
openstax_science |
56.21 | 1220 | 33% | 2312 downrated | 3 |
openstax_society |
56.86 | 1622 | 33% | 2336 downrated | 3 |
wpa_life_histories |
3.97 | 8076 | 33% | 13069 downrated | 2 |
Best form = the single best-ranked form in the corpus, share-blind — how the spelling itself ranked. Share = how much of that spelling belongs to this lemma, when several senses compete for it. Zipf rank = all the forms combined (variant spellings included), each scaled by its share, and what feeds the combined frequency rank. Combining forms improves on the best form, but a share below 100% pushes the other way and usually wins: a sense holding a small slice of a common spelling is a rare word, so its rank lands downrated below the best form — and once it falls past what the corpus can support it is capped at the rank an unlisted word would get.