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: 1744 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 111.14 857 100% 857 1
20th_books 85.39 1127 100% 1127 1
wiki_math 0.00 — — — 0
wiki_geography 102.25 1359 100% 1359 1
wiki_biology 0.00 — — — 0
wiki_modern_life 50.66 2869 100% 2869 1
wiki_arts 33.06 4006 100% 4006 1
wiki_society 0.00 — — — 0
wiki_linguistics 54.99 2227 100% 2227 1
wiki_physical_science 41.23 3164 100% 3164 1
wiki_history 0.00 — — — 0
early_modern_science 116.51 988 100% 988 1
religious_translated 113.90 917 100% 917 1
cooking 379.65 407 100% 407 1
legal_scotus 147.29 893 100% 893 1
eu_parliament_debates 13.17 4832 100% 4832 1
openstax_science 0.00 — — — 0
openstax_society 0.00 — — — 0
wpa_life_histories 68.40 1381 100% 1381 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.