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: 1589 (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 58.54 1557 100% 1557 1
20th_books 66.25 1518 100% 1312 2
wiki_math 41.46 2296 100% 2296 1
wiki_geography 0.00 — — — 0
wiki_biology 45.84 2918 100% 2918 1
wiki_modern_life 29.50 4563 100% 4563 1
wiki_arts 82.48 1667 100% 1667 1
wiki_society 60.84 2298 100% 2298 1
wiki_linguistics 84.89 1509 100% 1509 1
wiki_physical_science 41.48 3141 100% 3141 1
wiki_history 56.13 2444 100% 2444 1
early_modern_science 86.15 1342 100% 1342 1
religious_translated 53.95 1828 100% 1828 1
cooking 0.00 — — — 0
legal_scotus 315.42 397 100% 379 2
eu_parliament_debates 396.26 303 100% 303 1
openstax_science 76.42 1794 100% 1794 1
openstax_society 116.88 1207 100% 1207 1
wpa_life_histories 9.15 6388 100% 6388 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.