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: 1438 (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 72.12 1279 100% 1279 1
20th_books 44.38 1965 100% 1965 1
wiki_math 170.44 800 100% 800 1
wiki_geography 30.45 4330 100% 4330 1
wiki_biology 100.28 1396 100% 1396 1
wiki_modern_life 114.15 1285 100% 1285 1
wiki_arts 64.80 2149 100% 2149 1
wiki_society 108.32 1295 100% 1295 1
wiki_linguistics 157.49 847 100% 847 1
wiki_physical_science 98.95 1476 100% 1476 1
wiki_history 47.73 2860 100% 2860 1
early_modern_science 129.79 874 100% 874 1
religious_translated 72.32 1423 100% 1423 1
cooking 52.95 1717 100% 1717 1
legal_scotus 374.91 322 100% 322 1
eu_parliament_debates 110.64 1086 100% 1086 1
openstax_science 54.82 2362 100% 2362 1
openstax_society 85.08 1621 100% 1621 1
wpa_life_histories 28.60 2753 100% 2753 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.