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 |
11.73 | 8784 | 100% | 4611 | 2 |
20th_books |
5.68 | 9166 | 100% | 9166 | 1 |
wiki_math |
115.17 | 1524 | 100% | 824 | 3 |
wiki_geography |
225.17 | 953 | 100% | 604 | 3 |
wiki_biology |
83.44 | 2539 | 100% | 1556 | 2 |
wiki_modern_life |
103.89 | 2099 | 100% | 1396 | 2 |
wiki_arts |
123.72 | 1421 | 100% | 1100 | 2 |
wiki_society |
150.52 | 1711 | 100% | 920 | 3 |
wiki_linguistics |
54.99 | 2217 | 100% | 2217 | 1 |
wiki_physical_science |
152.92 | 2533 | 100% | 895 | 3 |
wiki_history |
191.44 | 1210 | 100% | 697 | 3 |
early_modern_science |
48.96 | 3447 | 100% | 1954 | 2 |
religious_translated |
0.00 | — | — | — | 0 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
59.48 | 3941 | 100% | 1528 | 3 |
eu_parliament_debates |
41.30 | 4333 | 100% | 1565 | 3 |
openstax_science |
172.36 | 2038 | 100% | 721 | 4 |
openstax_society |
270.93 | 1217 | 100% | 512 | 3 |
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.