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: 878 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 80.96 1155 100% 1155 1
20th_books 74.04 1287 100% 1287 1
wiki_math 0.00 — — — 0
wiki_geography 348.56 337 100% 337 1
wiki_biology 25.98 4491 100% 4491 1
wiki_modern_life 146.20 958 100% 958 1
wiki_arts 123.23 1103 100% 1103 1
wiki_society 255.37 450 100% 450 1
wiki_linguistics 45.68 2586 100% 2586 1
wiki_physical_science 0.00 — — — 0
wiki_history 173.30 744 100% 744 1
early_modern_science 54.67 2064 100% 2064 1
religious_translated 30.78 2904 100% 2904 1
cooking 0.00 — — — 0
legal_scotus 578.62 176 100% 176 1
eu_parliament_debates 164.46 718 100% 718 1
openstax_science 29.51 3865 100% 3865 1
openstax_society 317.05 396 100% 396 1
wpa_life_histories 69.02 1408 100% 1408 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.