Base Difficulty

Base difficulty: Level 8 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: 942 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr A1 (1 of 6) 800

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 77.14 1474 100% 1132 2
20th_books 129.36 1148 100% 720 2
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 375.96 354 100% 318 2
wiki_modern_life 53.03 2762 100% 2762 1
wiki_arts 28.08 4619 100% 4619 1
wiki_society 116.19 1187 100% 1187 1
wiki_linguistics 145.10 908 100% 908 1
wiki_physical_science 108.18 1355 100% 1355 1
wiki_history 0.00 — — — 0
early_modern_science 37.97 2808 100% 2808 1
religious_translated 0.00 — — — 0
cooking 38.31 2094 100% 2094 1
legal_scotus 6.27 8844 100% 8844 1
eu_parliament_debates 0.00 — — — 0
openstax_science 880.65 108 100% 104 2
openstax_society 281.09 529 100% 470 2
wpa_life_histories 25.99 4965 100% 2701 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.