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: 486 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 536.49 120 50% 240 downrated 1
20th_books 447.81 147 50% 294 downrated 1
wiki_math 85.46 797 50% 1594 downrated 1
wiki_geography 138.04 443 50% 886 downrated 1
wiki_biology 143.24 424 50% 848 downrated 1
wiki_modern_life 185.92 280 50% 560 downrated 1
wiki_arts 319.30 152 50% 304 downrated 1
wiki_society 325.32 144 50% 288 downrated 1
wiki_linguistics 185.68 334 50% 668 downrated 1
wiki_physical_science 93.50 770 50% 1540 downrated 1
wiki_history 383.87 122 50% 244 downrated 1
early_modern_science 310.39 162 50% 324 downrated 1
religious_translated 496.98 127 50% 254 downrated 1
cooking 90.15 715 50% 1430 downrated 1
legal_scotus 296.90 172 50% 344 downrated 1
eu_parliament_debates 333.60 187 50% 374 downrated 1
openstax_science 139.64 480 50% 960 downrated 1
openstax_society 417.50 123 50% 246 downrated 1
wpa_life_histories 290.51 201 50% 402 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.