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: 930 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cambridge_yle Movers (2 of 3) 750
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 164.96 683 100% 565 2
20th_books 202.56 640 100% 478 3
wiki_math 187.09 1171 100% 651 2
wiki_geography 0.00 — — — 0
wiki_biology 103.55 2055 100% 1289 2
wiki_modern_life 209.32 1339 100% 703 2
wiki_arts 92.17 2954 100% 1482 2
wiki_society 64.20 3902 100% 2079 2
wiki_linguistics 102.11 2259 100% 1178 2
wiki_physical_science 83.08 3059 100% 1568 2
wiki_history 29.70 4336 100% 4336 1
early_modern_science 159.09 807 100% 691 2
religious_translated 112.07 933 100% 933 1
cooking 66.48 1486 100% 1486 1
legal_scotus 66.38 2586 100% 1613 2
eu_parliament_debates 169.45 1201 100% 683 2
openstax_science 174.14 1567 100% 792 2
openstax_society 172.79 1456 100% 799 2
wpa_life_histories 169.40 758 100% 593 2

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.