Base Difficulty

Base difficulty: Level 16 edit

Level distribution for adjective (personal_quality): 16: 18 340: 1 359: 20 360: 1 1000: 1 1120: 4 1399: 4

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: 602 (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 Flyers (3 of 3) 1200
cefr A2 (2 of 6) 2100

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 395.27 287 100% 267 3
20th_books 425.05 268 100% 268 1
wiki_math 146.26 916 100% 916 1
wiki_geography 49.66 2761 100% 2761 1
wiki_biology 61.24 2244 100% 2244 1
wiki_modern_life 119.07 1231 100% 1231 1
wiki_arts 142.37 934 100% 934 1
wiki_society 139.44 971 100% 971 1
wiki_linguistics 108.91 1196 100% 1196 1
wiki_physical_science 87.70 1659 100% 1659 1
wiki_history 89.78 1491 100% 1491 1
early_modern_science 584.82 177 100% 177 1
religious_translated 231.47 467 100% 467 1
cooking 377.39 408 100% 408 1
legal_scotus 176.83 739 100% 739 1
eu_parliament_debates 239.22 514 100% 514 1
openstax_science 64.38 2065 100% 2065 1
openstax_society 107.79 1294 100% 1294 1
wpa_life_histories 460.98 270 100% 257 2

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.