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 |
A2 (2 of 6) | 2100 |
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 |
193.55 | 1028 | 100% | 463 | 4 |
20th_books |
129.14 | 1179 | 100% | 693 | 3 |
wiki_math |
643.77 | 470 | 100% | 204 | 4 |
wiki_geography |
311.30 | 955 | 100% | 441 | 4 |
wiki_biology |
624.23 | 723 | 100% | 220 | 4 |
wiki_modern_life |
1233.45 | 264 | 100% | 89 | 4 |
wiki_arts |
412.39 | 906 | 100% | 330 | 4 |
wiki_society |
497.64 | 812 | 100% | 274 | 4 |
wiki_linguistics |
296.30 | 1299 | 100% | 425 | 4 |
wiki_physical_science |
582.18 | 756 | 100% | 250 | 4 |
wiki_history |
404.08 | 453 | 100% | 304 | 3 |
early_modern_science |
200.00 | 1074 | 100% | 563 | 3 |
religious_translated |
105.58 | 1772 | 100% | 930 | 2 |
cooking |
734.51 | 359 | 100% | 193 | 3 |
legal_scotus |
554.57 | 687 | 100% | 235 | 4 |
eu_parliament_debates |
577.93 | 436 | 100% | 203 | 5 |
openstax_science |
897.13 | 348 | 100% | 145 | 4 |
openstax_society |
672.37 | 541 | 100% | 207 | 4 |
wpa_life_histories |
116.67 | 1284 | 100% | 752 | 3 |
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.