Base Difficulty

Base difficulty: Level 105 edit

Level distribution for adverb (intensity): 23: 7 105: 6 1399: 4

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: 1778 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cefr B2 (4 of 6) 6900

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 77.27 1201 100% 1201 1
20th_books 84.35 1147 100% 1147 1
wiki_math 41.58 2316 100% 2316 1
wiki_geography 47.17 2903 100% 2903 1
wiki_biology 112.21 1247 100% 1247 1
wiki_modern_life 73.42 2027 100% 2027 1
wiki_arts 80.94 1710 100% 1710 1
wiki_society 47.75 2938 100% 2938 1
wiki_linguistics 133.28 977 100% 977 1
wiki_physical_science 84.59 1733 100% 1733 1
wiki_history 53.97 2522 100% 2522 1
early_modern_science 183.77 591 100% 591 1
religious_translated 40.84 2300 100% 2300 1
cooking 48.45 1803 100% 1803 1
legal_scotus 48.98 2376 100% 2376 1
eu_parliament_debates 60.24 1781 100% 1781 1
openstax_science 67.33 1990 100% 1990 1
openstax_society 73.99 1872 100% 1872 1
wpa_life_histories 42.80 2111 100% 2111 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.