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: 339 (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 1023.92 136 100% 117 2
20th_books 991.75 146 100% 128 2
wiki_math 92.39 1884 100% 1072 2
wiki_geography 207.72 747 100% 631 2
wiki_biology 754.08 177 100% 145 2
wiki_modern_life 348.66 385 100% 336 2
wiki_arts 293.70 604 100% 439 2
wiki_society 259.09 613 100% 497 2
wiki_linguistics 146.72 901 100% 901 1
wiki_physical_science 61.75 2290 100% 2290 1
wiki_history 261.68 521 100% 460 2
early_modern_science 347.03 382 100% 313 2
religious_translated 431.46 328 100% 248 2
cooking 440.59 443 100% 323 2
legal_scotus 54.04 2402 100% 1910 2
eu_parliament_debates 60.98 2363 100% 1453 2
openstax_science 261.41 648 100% 526 2
openstax_society 168.24 1163 100% 822 2
wpa_life_histories 595.59 228 100% 197 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.