Base Difficulty

Base difficulty: Level 14 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: 256 (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 139.78 682 100% 682 1
20th_books 112.11 880 100% 880 1
wiki_math 724.11 206 100% 172 3
wiki_geography 332.62 421 100% 371 2
wiki_biology 1417.61 76 100% 68 3
wiki_modern_life 1079.68 112 100% 91 3
wiki_arts 517.36 249 100% 208 3
wiki_society 664.96 164 100% 147 3
wiki_linguistics 1233.38 108 100% 92 3
wiki_physical_science 799.97 199 100% 149 3
wiki_history 194.02 651 100% 651 1
early_modern_science 542.57 189 100% 189 1
religious_translated 133.75 802 100% 802 1
cooking 86.77 1254 100% 1254 1
legal_scotus 183.16 733 100% 680 2
eu_parliament_debates 654.87 191 100% 191 1
openstax_science 677.84 212 100% 167 3
openstax_society 520.84 269 100% 227 3
wpa_life_histories 52.43 1809 100% 1809 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.