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: 251 (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 Movers (2 of 3) 750
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 1148.23 114 100% 110 2
20th_books 1639.01 75 100% 73 2
wiki_math 171.60 794 100% 794 1
wiki_geography 286.88 428 100% 428 1
wiki_biology 516.43 204 100% 204 1
wiki_modern_life 546.40 176 100% 176 1
wiki_arts 432.03 239 100% 239 1
wiki_society 286.28 395 100% 395 1
wiki_linguistics 365.71 343 100% 343 1
wiki_physical_science 221.38 636 100% 636 1
wiki_history 409.20 252 100% 252 1
early_modern_science 358.25 298 100% 298 1
religious_translated 422.14 288 100% 266 2
cooking 337.96 448 100% 448 1
legal_scotus 151.74 868 100% 868 1
eu_parliament_debates 299.00 415 100% 415 1
openstax_science 383.36 322 100% 322 1
openstax_society 314.29 403 100% 403 1
wpa_life_histories 1592.49 90 100% 88 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.