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: 354 (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 464.22 241 100% 241 1
20th_books 539.26 226 100% 226 1
wiki_math 304.04 448 100% 448 1
wiki_geography 144.25 934 100% 934 1
wiki_biology 364.58 316 100% 316 1
wiki_modern_life 372.81 280 100% 280 1
wiki_arts 460.83 222 100% 222 1
wiki_society 517.34 185 100% 185 1
wiki_linguistics 591.00 200 100% 200 1
wiki_physical_science 351.81 376 100% 376 1
wiki_history 324.61 348 100% 348 1
early_modern_science 355.22 302 100% 302 1
religious_translated 205.56 529 100% 529 1
cooking 189.26 683 100% 683 1
legal_scotus 670.50 153 100% 153 1
eu_parliament_debates 390.74 312 100% 312 1
openstax_science 263.74 517 100% 517 1
openstax_society 434.48 265 100% 265 1
wpa_life_histories 202.92 535 100% 535 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.