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: 1448 (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 108.11 879 100% 879 1
20th_books 103.27 951 100% 951 1
wiki_math 43.76 2219 100% 2219 1
wiki_geography 77.17 1828 100% 1828 1
wiki_biology 118.90 1181 100% 1181 1
wiki_modern_life 80.38 1839 100% 1839 1
wiki_arts 126.99 1064 100% 1064 1
wiki_society 82.65 1710 100% 1710 1
wiki_linguistics 107.31 1213 100% 1213 1
wiki_physical_science 80.96 1794 100% 1794 1
wiki_history 76.69 1775 100% 1775 1
early_modern_science 188.61 570 100% 570 1
religious_translated 60.91 1661 100% 1661 1
cooking 107.02 1096 100% 1096 1
legal_scotus 181.28 714 100% 714 1
eu_parliament_debates 105.12 1136 100% 1136 1
openstax_science 57.73 2260 100% 2260 1
openstax_society 71.45 1927 100% 1927 1
wpa_life_histories 53.08 1736 100% 1736 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.