Base Difficulty

Base difficulty: Level 23 edit

Level distribution for adverb (location): 18: 4 23: 22 250: 13 1070: 1 1120: 5 1205: 1 1221: 1 1399: 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: 249 (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 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 1552.05 76 97% 78 downrated 1
20th_books 1862.24 68 97% 70 downrated 1
wiki_math 124.11 1036 97% 1067 downrated 1
wiki_geography 256.24 467 97% 481 downrated 1
wiki_biology 345.96 327 97% 337 downrated 1
wiki_modern_life 391.63 247 97% 254 downrated 1
wiki_arts 308.86 340 97% 350 downrated 1
wiki_society 229.28 508 97% 523 downrated 1
wiki_linguistics 167.42 765 97% 788 downrated 1
wiki_physical_science 323.85 400 97% 412 downrated 1
wiki_history 283.94 389 97% 401 downrated 1
early_modern_science 608.68 160 97% 165 downrated 1
religious_translated 958.62 129 97% 133 downrated 1
cooking 429.84 356 97% 367 downrated 1
legal_scotus 140.65 899 97% 926 downrated 1
eu_parliament_debates 360.70 328 97% 338 downrated 1
openstax_science 477.43 218 97% 225 downrated 1
openstax_society 374.51 309 97% 318 downrated 1
wpa_life_histories 1843.29 75 97% 77 downrated 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.