Base Difficulty

Base difficulty: Level 18 edit

Level distribution for determiner (determiner_other): 6: 1 8: 1 9: 1 10: 10 11: 3 14: 2 18: 1

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: 1138 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B2 (4 of 6) 6900

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 171.03 580 100% 580 1
20th_books 147.03 689 100% 689 1
wiki_math 135.12 983 100% 983 1
wiki_geography 30.07 4368 100% 4368 1
wiki_biology 46.90 2873 100% 2873 1
wiki_modern_life 53.03 2767 100% 2767 1
wiki_arts 55.83 2499 100% 2499 1
wiki_society 89.66 1581 100% 1581 1
wiki_linguistics 94.59 1374 100% 1374 1
wiki_physical_science 62.00 2283 100% 2283 1
wiki_history 89.47 1510 100% 1510 1
early_modern_science 185.67 584 100% 584 1
religious_translated 573.15 218 100% 218 1
cooking 32.68 2304 100% 2304 1
legal_scotus 345.27 347 100% 347 1
eu_parliament_debates 84.78 1365 100% 1365 1
openstax_science 54.03 2394 100% 2394 1
openstax_society 81.85 1672 100% 1672 1
wpa_life_histories 81.79 1207 100% 1207 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.