Base Difficulty

Base difficulty: Level 23 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: 135 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Movers (2 of 3) 750
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 1050.09 64 50% 128 downrated 1
20th_books 876.90 72 50% 144 downrated 1
wiki_math 884.06 60 50% 120 downrated 1
wiki_geography 768.45 53 50% 106 downrated 1
wiki_biology 1117.05 47 50% 94 downrated 1
wiki_modern_life 1210.85 40 50% 80 downrated 1
wiki_arts 949.16 49 50% 98 downrated 1
wiki_society 911.93 46 50% 92 downrated 1
wiki_linguistics 974.88 59 50% 118 downrated 1
wiki_physical_science 1050.72 46 50% 92 downrated 1
wiki_history 715.97 60 50% 120 downrated 1
early_modern_science 1379.02 45 50% 90 downrated 1
religious_translated 620.76 101 50% 202 downrated 1
cooking 636.10 125 50% 250 downrated 1
legal_scotus 647.23 79 50% 158 downrated 1
eu_parliament_debates 1096.51 54 50% 108 downrated 1
openstax_science 1133.13 41 50% 82 downrated 1
openstax_society 1419.71 33 50% 66 downrated 1
wpa_life_histories 704.72 100 50% 200 downrated 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.