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: 1771 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 21.76 5473 100% 3078 2
20th_books 18.51 6516 100% 3315 2
wiki_math 54.28 1906 100% 1906 1
wiki_geography 62.61 2250 100% 2250 1
wiki_biology 151.54 1720 100% 913 2
wiki_modern_life 155.87 1464 100% 941 2
wiki_arts 42.29 3209 100% 3209 1
wiki_society 73.04 1922 100% 1922 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 0.00 — — — 0
wiki_history 55.13 2481 100% 2481 1
early_modern_science 45.18 3750 100% 2079 2
religious_translated 0.00 — — — 0
cooking 95.78 1671 100% 914 2
legal_scotus 59.30 2045 100% 2045 1
eu_parliament_debates 206.11 591 100% 591 1
openstax_science 349.52 638 100% 401 2
openstax_society 29.76 3913 100% 3913 1
wpa_life_histories 47.95 2579 100% 1714 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.