Base Difficulty

Base difficulty: Level 10 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: 147 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 730.79 170 100% 170 1
20th_books 665.93 186 100% 186 1
wiki_math 508.15 271 100% 271 1
wiki_geography 408.87 265 100% 265 1
wiki_biology 690.58 142 100% 142 1
wiki_modern_life 575.59 165 100% 165 1
wiki_arts 601.94 166 100% 166 1
wiki_society 1014.24 82 100% 82 1
wiki_linguistics 775.50 155 100% 155 1
wiki_physical_science 636.06 164 100% 164 1
wiki_history 576.11 164 100% 164 1
early_modern_science 1741.24 67 100% 67 1
religious_translated 2443.76 56 100% 56 1
cooking 325.65 464 100% 464 1
legal_scotus 1429.04 71 100% 71 1
eu_parliament_debates 1294.12 89 100% 89 1
openstax_science 703.19 138 100% 138 1
openstax_society 1512.09 67 100% 67 1
wpa_life_histories 938.21 142 100% 142 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.