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: 816 (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 443.79 252 100% 252 1
20th_books 258.90 402 100% 402 1
wiki_math 125.53 1058 100% 1058 1
wiki_geography 0.00 — — — 0
wiki_biology 38.68 3364 100% 3364 1
wiki_modern_life 34.42 4021 100% 4021 1
wiki_arts 81.50 1691 100% 1691 1
wiki_society 71.57 1966 100% 1966 1
wiki_linguistics 54.99 2222 100% 2222 1
wiki_physical_science 52.47 2632 100% 2632 1
wiki_history 80.89 1681 100% 1681 1
early_modern_science 337.76 318 100% 318 1
religious_translated 408.41 284 100% 284 1
cooking 85.62 1269 100% 1269 1
legal_scotus 426.50 270 100% 270 1
eu_parliament_debates 377.78 324 100% 324 1
openstax_science 67.70 1977 100% 1977 1
openstax_society 133.81 1060 100% 1060 1
wpa_life_histories 47.81 1871 100% 1871 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.