Base difficulty: Level 230 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 |
|---|---|---|
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 |
158.24 | 908 | 100% | 570 | 3 |
20th_books |
158.18 | 891 | 100% | 579 | 3 |
wiki_math |
128.19 | 1033 | 100% | 1033 | 1 |
wiki_geography |
158.75 | 839 | 100% | 839 | 1 |
wiki_biology |
185.45 | 729 | 100% | 729 | 1 |
wiki_modern_life |
103.70 | 1420 | 100% | 1420 | 1 |
wiki_arts |
178.40 | 905 | 100% | 743 | 2 |
wiki_society |
77.81 | 1807 | 100% | 1807 | 1 |
wiki_linguistics |
59.12 | 2114 | 100% | 2114 | 1 |
wiki_physical_science |
468.63 | 259 | 100% | 259 | 1 |
wiki_history |
206.91 | 590 | 100% | 590 | 1 |
early_modern_science |
387.28 | 372 | 100% | 280 | 3 |
religious_translated |
56.91 | 2510 | 100% | 1554 | 2 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
57.48 | 2740 | 100% | 1796 | 2 |
eu_parliament_debates |
16.36 | 4234 | 100% | 4234 | 1 |
openstax_science |
235.64 | 712 | 100% | 582 | 2 |
openstax_society |
122.36 | 1626 | 100% | 1082 | 2 |
wpa_life_histories |
50.87 | 2195 | 100% | 1645 | 2 |
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.