Base difficulty: Level 279 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
No difficulty overrides set. The base difficulty level will be used for all languages.
Add Difficulty Override
Tier Signals
| Source | Tier | Rank used |
|---|---|---|
basic_english |
Basic (1 of 2) | 600 |
cambridge_yle |
Flyers (3 of 3) | 1200 |
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 |
111.29 | 1284 | 100% | 751 | 4 |
20th_books |
79.93 | 1696 | 100% | 1023 | 3 |
wiki_math |
0.00 | — | — | — | 0 |
wiki_geography |
0.00 | — | — | — | 0 |
wiki_biology |
198.08 | 672 | 100% | 672 | 1 |
wiki_modern_life |
70.42 | 2116 | 100% | 2116 | 1 |
wiki_arts |
38.98 | 3478 | 100% | 3478 | 1 |
wiki_society |
27.77 | 4654 | 100% | 4654 | 1 |
wiki_linguistics |
0.00 | — | — | — | 0 |
wiki_physical_science |
0.00 | — | — | — | 0 |
wiki_history |
0.00 | — | — | — | 0 |
early_modern_science |
48.22 | 2299 | 100% | 2299 | 1 |
religious_translated |
112.07 | 1114 | 100% | 880 | 2 |
cooking |
732.44 | 225 | 100% | 225 | 1 |
legal_scotus |
0.00 | — | — | — | 0 |
eu_parliament_debates |
0.00 | — | — | — | 0 |
openstax_science |
95.17 | 1449 | 100% | 1449 | 1 |
openstax_society |
60.76 | 3127 | 100% | 1933 | 2 |
wpa_life_histories |
45.04 | 2584 | 100% | 1808 | 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.