Base Difficulty

Base difficulty: Level 105 edit

Level distribution for adverb (style): 6: 1 19: 4 20: 4 105: 46 1080: 1 1202: 1 1399: 2

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: 1272 (weighted harmonic mean of corpus + tier signals; lower = more common)
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 101.12 990 100% 895 2
20th_books 97.17 1014 100% 1014 1
wiki_math 137.05 973 100% 973 1
wiki_geography 39.40 3448 100% 3448 1
wiki_biology 146.83 944 100% 944 1
wiki_modern_life 176.15 933 100% 782 2
wiki_arts 69.71 1961 100% 1961 1
wiki_society 55.39 2508 100% 2508 1
wiki_linguistics 83.29 1534 100% 1534 1
wiki_physical_science 144.17 1016 100% 1016 1
wiki_history 49.73 2747 100% 2747 1
early_modern_science 291.84 404 100% 368 2
religious_translated 81.80 1258 100% 1258 1
cooking 223.06 602 100% 602 1
legal_scotus 71.83 1858 100% 1564 2
eu_parliament_debates 39.71 2418 100% 2418 1
openstax_science 178.18 910 100% 764 2
openstax_society 94.99 1456 100% 1456 1
wpa_life_histories 37.06 2288 100% 2288 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.