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: 1559 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 12.26 5651 100% 5651 1
20th_books 25.66 3173 100% 3173 1
wiki_math 0.00 — — — 0
wiki_geography 122.11 1120 100% 1120 1
wiki_biology 148.27 936 100% 936 1
wiki_modern_life 106.24 1392 100% 1392 1
wiki_arts 79.21 1739 100% 1739 1
wiki_society 136.63 992 100% 992 1
wiki_linguistics 23.49 4087 100% 4087 1
wiki_physical_science 143.92 1020 100% 1020 1
wiki_history 93.90 1421 100% 1421 1
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 78.50 1641 100% 1641 1
eu_parliament_debates 252.07 488 100% 488 1
openstax_science 238.82 586 100% 586 1
openstax_society 91.69 1507 100% 1507 1
wpa_life_histories 26.31 2935 100% 2935 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.