Base Difficulty

Base difficulty: Level 20 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: 522 (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 Flyers (3 of 3) 1200
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 372.38 295 100% 295 1
20th_books 361.57 315 100% 302 2
wiki_math 120.11 1102 100% 1102 1
wiki_geography 129.33 1048 100% 1048 1
wiki_biology 151.18 908 100% 908 1
wiki_modern_life 272.01 426 100% 426 1
wiki_arts 234.23 515 100% 515 1
wiki_society 187.64 681 100% 681 1
wiki_linguistics 325.68 395 100% 395 1
wiki_physical_science 127.51 1138 100% 1138 1
wiki_history 202.49 613 100% 613 1
early_modern_science 344.37 313 100% 313 1
religious_translated 462.81 249 100% 249 1
cooking 309.88 481 100% 481 1
legal_scotus 217.16 582 100% 582 1
eu_parliament_debates 298.33 416 100% 416 1
openstax_science 136.32 1042 100% 1042 1
openstax_society 165.76 865 100% 865 1
wpa_life_histories 242.00 452 100% 452 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.