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: 1809 (weighted harmonic mean of corpus + tier signals; lower = more common)
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 99.95 1916 100% 861 3
20th_books 71.30 2301 100% 1105 3
wiki_math 19.63 3645 100% 3645 1
wiki_geography 0.00 — — — 0
wiki_biology 29.59 4082 100% 4082 1
wiki_modern_life 0.00 — — — 0
wiki_arts 0.00 — — — 0
wiki_society 99.04 3090 100% 1343 3
wiki_linguistics 0.00 — — — 0
wiki_physical_science 0.00 — — — 0
wiki_history 28.83 4434 100% 4434 1
early_modern_science 258.57 1030 100% 448 3
religious_translated 42.97 3271 100% 1912 2
cooking 0.00 — — — 0
legal_scotus 117.18 2089 100% 945 3
eu_parliament_debates 146.93 1635 100% 697 3
openstax_science 147.12 1814 100% 870 3
openstax_society 161.63 2367 100% 774 4
wpa_life_histories 17.70 6914 100% 3558 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.