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: 618 (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 212.96 497 100% 461 2
20th_books 232.42 481 100% 442 2
wiki_math 100.47 1233 100% 1233 1
wiki_geography 74.94 1881 100% 1881 1
wiki_biology 111.49 1253 100% 1253 1
wiki_modern_life 115.50 1270 100% 1270 1
wiki_arts 121.58 1124 100% 1124 1
wiki_society 125.21 1097 100% 1097 1
wiki_linguistics 124.68 1038 100% 1038 1
wiki_physical_science 116.22 1270 100% 1270 1
wiki_history 129.90 1018 100% 1018 1
early_modern_science 215.28 498 100% 498 1
religious_translated 199.95 543 100% 543 1
cooking 299.74 493 100% 493 1
legal_scotus 656.94 161 100% 153 3
eu_parliament_debates 792.24 161 100% 152 2
openstax_science 159.17 895 100% 895 1
openstax_society 201.31 705 100% 705 1
wpa_life_histories 89.63 1124 100% 1124 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.