Base Difficulty

Base difficulty: Level 469 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: 3698 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 42.13 1112 50% 2224 downrated 1
20th_books 25.56 1735 50% 3470 downrated 1
wiki_math 12.70 3156 50% 6312 downrated 1
wiki_geography 74.61 897 50% 1794 downrated 1
wiki_biology 28.32 2424 50% 4848 downrated 1
wiki_modern_life 26.08 2814 50% 5628 downrated 1
wiki_arts 24.78 2801 50% 5602 downrated 1
wiki_society 29.71 2345 50% 4690 downrated 1
wiki_linguistics 30.90 2042 50% 4084 downrated 1
wiki_physical_science 30.75 2305 50% 4610 downrated 1
wiki_history 39.85 1706 50% 3412 downrated 1
early_modern_science 112.39 482 50% 964 downrated 1
religious_translated 41.04 1257 50% 2514 downrated 1
cooking 0.00 — — — 0
legal_scotus 20.54 2771 50% 5542 downrated 1
eu_parliament_debates 19.07 2492 50% 4984 downrated 1
openstax_science 33.04 2022 50% 4044 downrated 1
openstax_society 44.44 1551 50% 3102 downrated 1
wpa_life_histories 9.30 4110 50% 8220 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.