Base difficulty: Level 265 edit
Level distribution for verb (perception): 5: 1 8: 2 185: 1 205: 1 214: 12 230: 1 265: 1 279: 1 455: 1 1040: 1 1399: 4
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
basic_english |
Basic (1 of 2) | 600 |
cefr |
B2 (4 of 6) | 6900 |
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 |
9.68 | 487 | 4% | 10230 downrated | 2 |
20th_books |
14.36 | 498 | 4% | 5201 downrated | 3 |
wiki_math |
13.99 | 390 | 4% | 8000 capped | 1 |
wiki_geography |
1.52 | 3448 | 4% | 9000 capped | 1 |
wiki_biology |
8.69 | 727 | 4% | 9000 capped | 2 |
wiki_modern_life |
4.33 | 1308 | 4% | 10000 capped | 1 |
wiki_arts |
9.05 | 512 | 4% | 10000 capped | 1 |
wiki_society |
16.71 | 267 | 4% | 6464 downrated | 2 |
wiki_linguistics |
9.07 | 632 | 4% | 9000 capped | 2 |
wiki_physical_science |
4.72 | 1195 | 4% | 8000 capped | 1 |
wiki_history |
5.11 | 1001 | 4% | 9000 capped | 1 |
early_modern_science |
6.24 | 1006 | 4% | 10400 capped | 2 |
religious_translated |
24.57 | 303 | 4% | 4502 downrated | 2 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
8.20 | 593 | 4% | 15418 downrated | 1 |
eu_parliament_debates |
6.34 | 715 | 4% | 11000 capped | 1 |
openstax_science |
27.29 | 957 | 4% | 4024 downrated | 3 |
openstax_society |
13.08 | 397 | 4% | 9516 downrated | 2 |
wpa_life_histories |
2.85 | 1310 | 4% | 20000 capped | 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.