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: 417 (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 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 1235.29 126 97% 100 2
20th_books 1321.26 106 97% 94 2
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 568.88 285 97% 208 2
wiki_modern_life 122.56 1692 97% 1190 2
wiki_arts 135.36 1929 97% 1023 2
wiki_society 95.46 2761 97% 1470 2
wiki_linguistics 61.57 2827 97% 1727 2
wiki_physical_science 179.36 1060 97% 801 2
wiki_history 101.08 2381 97% 1350 2
early_modern_science 449.72 337 97% 243 2
religious_translated 781.97 225 97% 153 2
cooking 76.58 1913 97% 1056 2
legal_scotus 28.29 5168 97% 2838 2
eu_parliament_debates 69.11 2507 97% 1339 2
openstax_science 362.74 527 97% 381 2
openstax_society 115.98 2071 97% 1170 2
wpa_life_histories 402.47 384 97% 271 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.