Base Difficulty

Base difficulty: Level 17 edit

Level distribution for adjective (size): 14: 3 17: 4 101: 6 340: 1 380: 1 420: 1 1010: 1 1080: 1 1120: 6

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: 192 (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 Flyers (3 of 3) 1200
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 238.11 304 50% 422 downrated 3
20th_books 181.82 403 50% 524 downrated 3
wiki_math 606.92 233 50% 219 3
wiki_geography 2109.36 63 100% 42 3
wiki_biology 1890.94 57 50% 51 3
wiki_modern_life 1121.12 86 50% 85 3
wiki_arts 626.28 180 50% 183 downrated 3
wiki_society 603.85 238 50% 191 3
wiki_linguistics 359.03 396 50% 359 3
wiki_physical_science 1144.74 94 50% 97 downrated 3
wiki_history 487.20 199 50% 229 downrated 3
early_modern_science 675.52 131 50% 155 downrated 3
religious_translated 120.86 516 50% 845 downrated 2
cooking 742.96 131 50% 197 downrated 3
legal_scotus 123.32 788 50% 937 downrated 3
eu_parliament_debates 226.69 417 50% 497 downrated 3
openstax_science 1049.97 89 50% 98 downrated 3
openstax_society 740.93 180 50% 167 3
wpa_life_histories 298.89 289 50% 360 downrated 3

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.