Base Difficulty

Base difficulty: Level 17 edit

Level distribution for adjective (quality): 3: 1 11: 10 14: 12 17: 23 18: 3 20: 4 318: 35 320: 28 330: 1 340: 2 360: 2 380: 1 400: 3 420: 4 430: 27 469: 27 470: 2 1040: 2 1060: 2 1070: 13 1090: 3 1110: 2 1120: 47 1214: 1 1399: 16

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: 3841 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 18.82 1227 25% 4908 downrated 1
20th_books 17.98 1333 25% 5332 downrated 1
wiki_math 100.19 352 25% 1408 downrated 1
wiki_geography 19.93 1777 25% 7108 downrated 1
wiki_biology 39.51 861 25% 3444 downrated 1
wiki_modern_life 38.43 900 25% 3600 downrated 1
wiki_arts 59.47 502 25% 2008 downrated 1
wiki_society 33.47 1013 25% 4052 downrated 1
wiki_linguistics 38.43 865 25% 3460 downrated 1
wiki_physical_science 37.78 967 25% 3868 downrated 1
wiki_history 42.69 755 25% 3020 downrated 1
early_modern_science 39.77 703 25% 2812 downrated 1
religious_translated 32.23 825 25% 3300 downrated 1
cooking 12.96 1731 25% 5200 capped 1
legal_scotus 28.28 1149 25% 4596 downrated 1
eu_parliament_debates 27.86 1079 25% 4316 downrated 1
openstax_science 43.22 827 25% 3308 downrated 1
openstax_society 25.32 1374 25% 5496 downrated 1
wpa_life_histories 11.60 2000 25% 8000 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.