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: 354 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Flyers (3 of 3) 1200
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 424.34 376 100% 231 4
20th_books 230.53 701 100% 404 4
wiki_math 420.38 718 100% 297 4
wiki_geography 177.65 2065 100% 785 3
wiki_biology 722.33 376 100% 176 4
wiki_modern_life 315.38 1190 100% 465 3
wiki_arts 773.40 431 100% 157 4
wiki_society 435.23 868 100% 309 4
wiki_linguistics 604.06 461 100% 214 4
wiki_physical_science 501.77 620 100% 285 3
wiki_history 540.32 453 100% 227 4
early_modern_science 987.56 274 100% 109 5
religious_translated 398.36 731 100% 271 3
cooking 27.04 2549 100% 2549 1
legal_scotus 315.11 822 100% 398 4
eu_parliament_debates 159.79 1559 100% 658 3
openstax_science 365.73 727 100% 380 3
openstax_society 269.93 1239 100% 515 3
wpa_life_histories 105.09 1860 100% 798 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.