Base Difficulty

Base difficulty: Level 11 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: 138 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cambridge_yle Movers (2 of 3) 750
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 434.23 256 100% 256 1
20th_books 360.52 310 100% 310 1
wiki_math 1007.06 124 100% 124 1
wiki_geography 884.14 107 100% 107 1
wiki_biology 1274.73 71 100% 71 1
wiki_modern_life 1127.55 74 100% 74 1
wiki_arts 1093.20 80 100% 80 1
wiki_society 1084.98 74 100% 74 1
wiki_linguistics 1413.95 78 100% 78 1
wiki_physical_science 1017.09 89 100% 89 1
wiki_history 1006.74 86 100% 86 1
early_modern_science 754.06 134 100% 134 1
religious_translated 617.09 199 100% 199 1
cooking 333.54 452 100% 452 1
legal_scotus 770.68 132 100% 132 1
eu_parliament_debates 773.54 153 100% 153 1
openstax_science 1178.64 78 100% 78 1
openstax_society 1204.96 84 100% 84 1
wpa_life_histories 385.41 305 100% 305 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.