Base Difficulty

Base difficulty: Level 11 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: 602 (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 Flyers (3 of 3) 1200
cefr A1 (1 of 6) 800

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 205.26 233 40% 553 downrated 2
20th_books 198.41 244 40% 582 downrated 2
wiki_math 31.41 1471 40% 3678 downrated 1
wiki_geography 41.54 1329 40% 3322 downrated 1
wiki_biology 198.23 243 40% 558 downrated 2
wiki_modern_life 309.82 131 40% 304 downrated 2
wiki_arts 109.98 484 40% 1086 downrated 2
wiki_society 59.49 900 40% 2250 downrated 1
wiki_linguistics 29.67 1721 40% 4302 downrated 1
wiki_physical_science 553.78 68 40% 163 downrated 2
wiki_history 68.80 750 40% 1875 downrated 1
early_modern_science 461.88 97 40% 235 downrated 2
religious_translated 241.34 203 40% 507 downrated 1
cooking 341.15 196 40% 450 downrated 2
legal_scotus 111.07 444 40% 1110 downrated 1
eu_parliament_debates 53.16 899 40% 2248 downrated 1
openstax_science 539.93 74 40% 180 downrated 2
openstax_society 46.30 1221 40% 3052 downrated 1
wpa_life_histories 82.08 554 40% 1268 downrated 2

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.