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: 292 (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 344.82 311 100% 311 1
20th_books 192.25 552 100% 552 1
wiki_math 781.86 171 100% 171 1
wiki_geography 221.04 574 100% 574 1
wiki_biology 355.03 327 100% 327 1
wiki_modern_life 385.15 262 100% 262 1
wiki_arts 293.37 378 100% 378 1
wiki_society 516.93 183 100% 183 1
wiki_linguistics 538.50 225 100% 225 1
wiki_physical_science 706.59 136 100% 136 1
wiki_history 328.99 337 100% 337 1
early_modern_science 884.29 117 100% 117 1
religious_translated 1183.46 109 100% 109 1
cooking 157.76 789 100% 789 1
legal_scotus 695.40 144 100% 144 1
eu_parliament_debates 219.28 561 100% 561 1
openstax_science 805.85 115 100% 115 1
openstax_society 462.56 246 100% 246 1
wpa_life_histories 65.65 1481 100% 1481 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.