Base Difficulty

Base difficulty: Level 270 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: 1095 (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 17.04 3405 40% 4674 downrated 2
20th_books 15.99 3448 40% 4802 downrated 2
wiki_math 717.88 132 40% 178 downrated 2
wiki_geography 26.49 2121 40% 5302 downrated 1
wiki_biology 38.39 2056 40% 3418 downrated 2
wiki_modern_life 136.29 555 40% 956 downrated 2
wiki_arts 212.23 238 40% 506 downrated 2
wiki_society 118.70 582 40% 1086 downrated 2
wiki_linguistics 133.28 582 40% 1000 downrated 2
wiki_physical_science 461.46 143 40% 229 downrated 2
wiki_history 81.98 885 40% 1618 downrated 2
early_modern_science 109.65 549 40% 1009 downrated 2
religious_translated 28.65 1756 40% 3240 downrated 2
cooking 0.00 — — — 0
legal_scotus 139.48 742 40% 935 downrated 2
eu_parliament_debates 76.79 1088 40% 1535 downrated 2
openstax_science 251.69 268 40% 488 downrated 2
openstax_society 70.93 1045 40% 1932 downrated 2
wpa_life_histories 7.71 5219 40% 8507 downrated 2

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.