Base difficulty: Level 475 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 |
6.07 | 9075 | 100% | 9075 | 1 |
20th_books |
5.05 | 9938 | 100% | 9938 | 1 |
wiki_math |
56.59 | 1864 | 100% | 1864 | 1 |
wiki_geography |
0.00 | — | — | — | 0 |
wiki_biology |
152.98 | 892 | 100% | 892 | 1 |
wiki_modern_life |
113.57 | 1292 | 100% | 1292 | 1 |
wiki_arts |
37.99 | 3555 | 100% | 3555 | 1 |
wiki_society |
32.19 | 4160 | 100% | 4160 | 1 |
wiki_linguistics |
276.77 | 1072 | 100% | 448 | 4 |
wiki_physical_science |
85.59 | 1714 | 100% | 1714 | 1 |
wiki_history |
0.00 | — | — | — | 0 |
early_modern_science |
84.67 | 1370 | 100% | 1370 | 1 |
religious_translated |
0.00 | — | — | — | 0 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
88.44 | 2775 | 100% | 1094 | 4 |
eu_parliament_debates |
39.84 | 2414 | 100% | 2414 | 1 |
openstax_science |
124.26 | 1552 | 100% | 1065 | 2 |
openstax_society |
22.32 | 4870 | 100% | 4870 | 1 |
wpa_life_histories |
0.00 | — | — | — | 0 |
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.