Base Difficulty

Base difficulty: Level 320 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: 2119 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr B2 (4 of 6) 6900

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 64.41 740 50% 1480 downrated 1
20th_books 44.27 1087 50% 2174 downrated 1
wiki_math 162.38 428 50% 856 downrated 1
wiki_geography 18.32 3702 50% 7404 downrated 1
wiki_biology 18.98 3413 50% 6826 downrated 1
wiki_modern_life 110.95 557 50% 1114 downrated 1
wiki_arts 30.44 2277 50% 4554 downrated 1
wiki_society 46.51 1536 50% 3072 downrated 1
wiki_linguistics 34.97 1825 50% 3650 downrated 1
wiki_physical_science 75.83 964 50% 1928 downrated 1
wiki_history 17.68 3719 50% 7438 downrated 1
early_modern_science 88.80 616 50% 1232 downrated 1
religious_translated 58.69 895 50% 1790 downrated 1
cooking 16.90 2250 50% 4500 downrated 1
legal_scotus 24.89 2341 50% 4682 downrated 1
eu_parliament_debates 15.87 2814 50% 5628 downrated 1
openstax_science 37.80 1815 50% 3630 downrated 1
openstax_society 53.69 1297 50% 2594 downrated 1
wpa_life_histories 35.80 1319 50% 2638 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.