Base Difficulty

Base difficulty: Level 15 edit

Level distribution for noun (body_part): 3: 14 8: 14 15: 10 160: 40 1010: 22 1060: 1 1090: 2

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-1299 for level
Frequency and Tier Signals
Combined Frequency Rank: — (run python -m storage.admin --calc-ranks to populate)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr A2 (2 of 6) 2100

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 212.41 476 100% 476 1
20th_books 149.36 661 100% 661 1
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 846.93 113 100% 113 1
wiki_modern_life 100.72 1432 100% 1432 1
wiki_arts 52.73 2487 100% 2487 1
wiki_society 106.19 1270 100% 1270 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 253.39 543 100% 543 1
wiki_history 69.79 1862 100% 1862 1
early_modern_science 123.14 903 100% 903 1
religious_translated 267.80 398 100% 398 1
cooking 45.32 1855 100% 1855 1
legal_scotus 40.81 2684 100% 2684 1
eu_parliament_debates 53.95 1963 100% 1963 1
openstax_science 1483.35 67 100% 67 1
openstax_society 67.17 2051 100% 2051 1
wpa_life_histories 100.37 990 100% 990 1

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.