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: 2680 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Starters (1 of 3) 325
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 66.30 277 17% 1662 downrated 1
20th_books 67.51 281 17% 1686 downrated 1
wiki_math 99.81 215 17% 1290 downrated 1
wiki_geography 36.23 585 17% 3510 downrated 1
wiki_biology 56.59 349 17% 2094 downrated 1
wiki_modern_life 56.61 314 17% 1884 downrated 1
wiki_arts 36.71 569 17% 3414 downrated 1
wiki_society 30.13 716 17% 4296 downrated 1
wiki_linguistics 42.27 521 17% 3126 downrated 1
wiki_physical_science 29.44 819 17% 4914 downrated 1
wiki_history 25.47 849 17% 5094 downrated 1
early_modern_science 45.67 398 17% 2388 downrated 1
religious_translated 27.17 656 17% 3936 downrated 1
cooking 34.36 638 17% 3828 downrated 1
legal_scotus 29.91 722 17% 4332 downrated 1
eu_parliament_debates 39.37 520 17% 3120 downrated 1
openstax_science 30.46 778 17% 4668 downrated 1
openstax_society 24.99 950 17% 5700 downrated 1
wpa_life_histories 44.38 418 17% 2508 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.