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: 437 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 171.42 563 97% 580 downrated 1
20th_books 89.24 1063 97% 1095 downrated 1
wiki_math 1140.89 133 97% 111 3
wiki_geography 255.76 468 97% 482 downrated 1
wiki_biology 231.20 531 97% 547 downrated 1
wiki_modern_life 288.06 376 97% 387 downrated 1
wiki_arts 259.49 429 97% 442 downrated 1
wiki_society 456.21 210 97% 216 downrated 1
wiki_linguistics 365.76 326 97% 336 downrated 1
wiki_physical_science 473.96 272 97% 261 2
wiki_history 360.13 284 97% 293 downrated 1
early_modern_science 446.41 226 97% 233 downrated 1
religious_translated 86.26 1152 97% 1187 downrated 1
cooking 121.44 955 97% 984 downrated 1
legal_scotus 543.95 191 97% 190 2
eu_parliament_debates 363.53 340 97% 324 2
openstax_science 234.83 573 97% 590 downrated 1
openstax_society 290.96 429 97% 442 downrated 1
wpa_life_histories 104.86 944 97% 972 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.