Base Difficulty

Base difficulty: Level 214 edit

Level distribution for verb (existence): 3: 2 10: 1 23: 1 135: 1 170: 1 179: 1 214: 8 215: 1 220: 1 329: 1 415: 1 475: 1 1399: 6

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: 340 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 357.35 519 100% 268 4
20th_books 270.71 654 100% 351 4
wiki_math 267.93 1290 100% 418 4
wiki_geography 757.93 512 100% 169 4
wiki_biology 681.20 450 100% 193 4
wiki_modern_life 435.39 1123 100% 337 4
wiki_arts 486.31 778 100% 274 4
wiki_society 423.73 906 100% 325 4
wiki_linguistics 453.05 877 100% 288 4
wiki_physical_science 497.50 718 100% 292 4
wiki_history 794.39 274 100% 147 4
early_modern_science 562.69 469 100% 199 4
religious_translated 338.74 845 100% 303 4
cooking 351.57 758 100% 335 3
legal_scotus 361.86 1110 100% 347 5
eu_parliament_debates 392.35 763 100% 281 5
openstax_science 416.43 892 100% 334 4
openstax_society 570.03 691 100% 247 4
wpa_life_histories 150.36 1359 100% 591 4

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.