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: 305 (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 1478.15 134 97% 92 2
20th_books 1343.31 164 97% 106 2
wiki_math 223.13 661 97% 601 2
wiki_geography 114.40 2097 97% 1155 2
wiki_biology 172.00 1109 97% 756 2
wiki_modern_life 551.32 210 97% 186 2
wiki_arts 406.07 345 97% 281 2
wiki_society 289.83 583 97% 446 2
wiki_linguistics 274.97 546 97% 475 2
wiki_physical_science 116.98 1223 97% 1260 downrated 1
wiki_history 275.58 729 97% 471 2
early_modern_science 488.06 325 97% 222 2
religious_translated 968.39 209 97% 124 2
cooking 341.33 672 97% 372 2
legal_scotus 192.95 853 97% 660 2
eu_parliament_debates 367.92 392 97% 332 2
openstax_science 238.87 724 97% 581 2
openstax_society 298.99 693 97% 469 2
wpa_life_histories 737.71 292 97% 160 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.