Base Difficulty

Base difficulty: Level 1399 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: 6847 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 1.29 5422 10% 20000 capped 1
20th_books 1.89 3985 10% 20000 capped 1
wiki_math 19.81 685 10% 6850 downrated 1
wiki_geography 52.98 199 10% 1990 downrated 1
wiki_biology 27.47 455 10% 4550 downrated 1
wiki_modern_life 15.78 871 10% 8710 downrated 1
wiki_arts 23.43 519 10% 5190 downrated 1
wiki_society 28.91 392 10% 3920 downrated 1
wiki_linguistics 26.11 512 10% 5120 downrated 1
wiki_physical_science 22.54 623 10% 6230 downrated 1
wiki_history 23.84 490 10% 4900 downrated 1
early_modern_science 11.54 996 10% 9960 downrated 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 8.62 1499 10% 14990 downrated 1
eu_parliament_debates 10.37 1146 10% 11000 capped 1
openstax_science 27.95 477 10% 4770 downrated 1
openstax_society 25.98 509 10% 5090 downrated 1
wpa_life_histories 1.12 5517 10% 20000 capped 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.