Base Difficulty

Base difficulty: Level 3 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: 7 (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 19061.37 8 67% 7 5
20th_books 19130.07 9 67% 7 5
wiki_math 30093.08 4 67% 4 5
wiki_geography 20205.80 7 67% 5 5
wiki_biology 19982.41 7 67% 6 5
wiki_modern_life 21738.63 7 67% 5 5
wiki_arts 19725.74 8 67% 5 5
wiki_society 20125.09 7 67% 5 5
wiki_linguistics 21992.79 7 67% 6 5
wiki_physical_science 24114.77 7 67% 5 5
wiki_history 19002.33 7 67% 6 5
early_modern_science 21799.77 8 67% 5 5
religious_translated 21907.19 6 67% 5 5
cooking 13358.75 10 67% 8 5
legal_scotus 16193.44 8 67% 6 5
eu_parliament_debates 21751.41 7 67% 6 5
openstax_science 20372.12 7 67% 7 5
openstax_society 14697.17 8 67% 6 5
wpa_life_histories 18624.62 8 67% 7 5

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.