Base difficulty: Level 140 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 |
38.37 | 2289 | 100% | 2289 | 1 |
20th_books |
43.96 | 2356 | 100% | 1773 | 2 |
wiki_math |
399.59 | 418 | 100% | 317 | 3 |
wiki_geography |
503.70 | 735 | 100% | 268 | 4 |
wiki_biology |
162.72 | 1480 | 100% | 819 | 3 |
wiki_modern_life |
325.04 | 662 | 100% | 413 | 4 |
wiki_arts |
59.47 | 2329 | 100% | 2329 | 1 |
wiki_society |
86.30 | 1646 | 100% | 1646 | 1 |
wiki_linguistics |
110.17 | 1928 | 100% | 1010 | 3 |
wiki_physical_science |
79.82 | 1813 | 100% | 1813 | 1 |
wiki_history |
57.16 | 2398 | 100% | 2398 | 1 |
early_modern_science |
205.03 | 668 | 100% | 515 | 3 |
religious_translated |
26.13 | 3297 | 100% | 3297 | 1 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
29.14 | 4160 | 100% | 2830 | 2 |
eu_parliament_debates |
31.55 | 2825 | 100% | 2825 | 1 |
openstax_science |
276.37 | 1015 | 100% | 482 | 4 |
openstax_society |
153.36 | 1454 | 100% | 840 | 3 |
wpa_life_histories |
28.23 | 2943 | 100% | 2943 | 1 |
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.