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: 2829 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cefr A2 (2 of 6) 2100

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 14.97 1847 31% 6003 downrated 1
20th_books 11.20 2313 31% 7517 downrated 1
wiki_math 50.32 832 31% 2704 downrated 1
wiki_geography 46.09 893 31% 2902 downrated 1
wiki_biology 37.14 1163 31% 3780 downrated 1
wiki_modern_life 61.04 647 31% 2103 downrated 1
wiki_arts 40.28 1028 31% 3341 downrated 1
wiki_society 62.06 630 31% 2048 downrated 1
wiki_linguistics 68.67 600 31% 1950 downrated 1
wiki_physical_science 61.20 721 31% 2343 downrated 1
wiki_history 47.30 844 31% 2743 downrated 1
early_modern_science 42.74 817 31% 2655 downrated 1
religious_translated 22.31 1419 31% 4612 downrated 1
cooking 0.00 — — — 0
legal_scotus 81.49 471 31% 1531 downrated 1
eu_parliament_debates 41.72 880 31% 2860 downrated 1
openstax_science 54.57 806 31% 2620 downrated 1
openstax_society 51.72 849 31% 2759 downrated 1
wpa_life_histories 6.97 3280 31% 10660 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.