Base Difficulty

Base difficulty: Level 18 edit

Level distribution for pronoun (pronoun_other): 9: 1 10: 3 11: 6 18: 9 226: 2

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: 1486 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B1 (3 of 6) 4200

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 183.95 537 100% 537 1
20th_books 139.67 722 100% 722 1
wiki_math 56.59 1867 100% 1867 1
wiki_geography 29.25 4466 100% 4466 1
wiki_biology 44.74 3002 100% 3002 1
wiki_modern_life 31.77 4332 100% 4332 1
wiki_arts 65.74 2127 100% 2127 1
wiki_society 43.86 3162 100% 3162 1
wiki_linguistics 61.80 2038 100% 2038 1
wiki_physical_science 37.90 3378 100% 3378 1
wiki_history 56.65 2421 100% 2421 1
early_modern_science 163.64 680 100% 680 1
religious_translated 314.54 348 100% 348 1
cooking 40.57 2023 100% 2023 1
legal_scotus 124.47 1053 100% 1053 1
eu_parliament_debates 44.52 2247 100% 2247 1
openstax_science 32.42 3609 100% 3609 1
openstax_society 39.27 3136 100% 3136 1
wpa_life_histories 171.42 625 100% 625 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.