Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for adjective (purpose): 350: 1 360: 11 390: 1 400: 1 1000: 1 1010: 1 1020: 1 1040: 4 1060: 2 1070: 4 1078: 1 1120: 14 1399: 23

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: 3408 (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 0.00 — — — 0
20th_books 0.00 — — — 0
wiki_math 0.00 — — — 0
wiki_geography 37.70 1675 44% 3769 downrated 1
wiki_biology 23.56 2561 44% 5762 downrated 1
wiki_modern_life 107.07 502 44% 1130 downrated 1
wiki_arts 0.00 — — — 0
wiki_society 24.85 2487 44% 5596 downrated 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 232.32 220 44% 495 downrated 1
wiki_history 40.98 1447 44% 3256 downrated 1
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 2.97 8602 44% 19354 downrated 1
eu_parliament_debates 85.79 621 44% 1397 downrated 1
openstax_science 127.55 453 44% 1019 downrated 1
openstax_society 30.47 2017 44% 4538 downrated 1
wpa_life_histories 0.00 — — — 0

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.