Base Difficulty

Base difficulty: Level 3 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: 903 (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 65.93 2075 100% 1300 2
20th_books 61.42 2202 100% 1349 2
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 649.45 347 100% 183 2
wiki_modern_life 60.33 2432 100% 2432 1
wiki_arts 27.42 4698 100% 4698 1
wiki_society 26.17 4848 100% 4848 1
wiki_linguistics 31.17 3367 100% 3367 1
wiki_physical_science 87.35 2538 100% 1517 2
wiki_history 33.83 3884 100% 3884 1
early_modern_science 78.97 1911 100% 1353 2
religious_translated 90.98 1472 100% 1068 2
cooking 391.01 656 100% 331 2
legal_scotus 5.87 9113 100% 9113 1
eu_parliament_debates 0.00 — — — 0
openstax_science 873.17 208 100% 129 2
openstax_society 71.93 3115 100% 1687 2
wpa_life_histories 89.18 1985 100% 1027 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.