Base Difficulty

Base difficulty: Level 214 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

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-1399 for level
Frequency and Tier Signals
Combined Frequency Rank: 1862 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 135.95 1170 100% 658 3
20th_books 38.49 3170 100% 1983 2
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 38.97 3351 100% 3351 1
wiki_modern_life 44.01 3281 100% 3281 1
wiki_arts 79.29 1745 100% 1745 1
wiki_society 169.95 1041 100% 802 2
wiki_linguistics 68.25 1869 100% 1869 1
wiki_physical_science 30.12 3994 100% 3994 1
wiki_history 57.96 2356 100% 2356 1
early_modern_science 139.72 1305 100% 822 2
religious_translated 213.70 1067 100% 458 4
cooking 0.00 — — — 0
legal_scotus 43.11 3350 100% 2187 2
eu_parliament_debates 11.79 5145 100% 5145 1
openstax_science 54.44 3455 100% 2060 2
openstax_society 152.95 1330 100% 893 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.