Base Difficulty

Base difficulty: Level 28 edit

Level distribution for noun (animal): 2: 11 28: 16 125: 20 130: 43 278: 12 1010: 15 1078: 19 1090: 4 1399: 9

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: 342 (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 136.72 1195 100% 674 2
20th_books 233.03 778 100% 426 2
wiki_math 20.73 3497 100% 3497 1
wiki_geography 202.22 980 100% 680 2
wiki_biology 1697.19 93 100% 58 3
wiki_modern_life 542.55 397 100% 214 2
wiki_arts 261.84 947 100% 515 2
wiki_society 352.04 689 100% 370 2
wiki_linguistics 127.60 1779 100% 982 2
wiki_physical_science 688.37 283 100% 191 2
wiki_history 146.34 1572 100% 929 2
early_modern_science 820.49 235 100% 129 2
religious_translated 141.36 1319 100% 726 2
cooking 68.72 2006 100% 1109 2
legal_scotus 13.35 7498 100% 4279 2
eu_parliament_debates 248.99 886 100% 480 2
openstax_science 821.12 223 100% 139 3
openstax_society 394.00 538 100% 349 2
wpa_life_histories 143.90 1129 100% 660 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.