Base Difficulty

Base difficulty: Level 274 edit

Level distribution for noun (concept_idea): 19: 2 26: 1 27: 1 221: 28 270: 30 274: 30 275: 28 280: 25 300: 1 360: 1 380: 2 1000: 1 1030: 1 1060: 5 1070: 6 1110: 4 1120: 4 1399: 66

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: 4521 (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 203.07 137 17% 633 downrated 2
wiki_geography 11.20 2090 17% 9000 capped 1
wiki_biology 7.88 2848 17% 9000 capped 1
wiki_modern_life 30.84 1034 17% 4629 downrated 2
wiki_arts 23.18 1468 17% 5972 downrated 2
wiki_society 58.68 464 17% 2082 downrated 2
wiki_linguistics 23.20 1324 17% 5371 downrated 2
wiki_physical_science 71.45 402 17% 1900 downrated 2
wiki_history 4.90 4361 17% 9000 capped 1
early_modern_science 3.48 4392 17% 10400 capped 1
religious_translated 3.97 3562 17% 10400 capped 1
cooking 0.00 — — — 0
legal_scotus 54.17 436 17% 2257 downrated 2
eu_parliament_debates 23.36 1034 17% 4723 downrated 2
openstax_science 23.62 1167 17% 5680 downrated 2
openstax_society 17.71 1779 17% 7385 downrated 2
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.