Base Difficulty

Base difficulty: Level 160 edit

Level distribution for noun (body_part): 3: 14 8: 14 125: 1 133: 10 160: 42 1010: 24 1060: 1 1090: 2 1399: 15

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: 1180 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Starters (1 of 3) 325
cefr B2 (4 of 6) 6900

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 94.28 1243 100% 941 2
20th_books 73.62 1581 100% 1175 2
wiki_math 92.39 2005 100% 1075 2
wiki_geography 0.00 — — — 0
wiki_biology 536.52 271 100% 218 2
wiki_modern_life 40.15 3571 100% 3571 1
wiki_arts 0.00 — — — 0
wiki_society 0.00 — — — 0
wiki_linguistics 0.00 — — — 0
wiki_physical_science 48.70 2773 100% 2773 1
wiki_history 0.00 — — — 0
early_modern_science 161.75 1065 100% 710 2
religious_translated 20.32 4007 100% 4007 1
cooking 78.88 1345 100% 1345 1
legal_scotus 0.00 — — — 0
eu_parliament_debates 0.00 — — — 0
openstax_science 115.95 1924 100% 1137 2
openstax_society 0.00 — — — 0
wpa_life_histories 73.95 1581 100% 1228 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.