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 |
13.32 | 5331 | 100% | 5331 | 1 |
20th_books |
12.62 | 5376 | 100% | 5376 | 1 |
wiki_math |
642.62 | 304 | 100% | 210 | 3 |
wiki_geography |
44.45 | 3078 | 100% | 3078 | 1 |
wiki_biology |
0.00 | — | — | — | 0 |
wiki_modern_life |
26.72 | 4948 | 100% | 4948 | 1 |
wiki_arts |
44.84 | 3056 | 100% | 3056 | 1 |
wiki_society |
39.74 | 3457 | 100% | 3457 | 1 |
wiki_linguistics |
0.00 | — | — | — | 0 |
wiki_physical_science |
114.69 | 2796 | 100% | 1118 | 3 |
wiki_history |
32.94 | 3981 | 100% | 3981 | 1 |
early_modern_science |
17.46 | 5062 | 100% | 5062 | 1 |
religious_translated |
17.21 | 4510 | 100% | 4510 | 1 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
21.04 | 5871 | 100% | 3359 | 2 |
eu_parliament_debates |
0.00 | — | — | — | 0 |
openstax_science |
64.79 | 4201 | 100% | 1610 | 3 |
openstax_society |
75.58 | 2410 | 100% | 1655 | 2 |
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.