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: 108 (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 2784.99 48 97% 49 downrated 1
20th_books 3222.57 43 97% 44 downrated 1
wiki_math 445.01 309 97% 318 downrated 1
wiki_geography 613.01 167 97% 172 downrated 1
wiki_biology 621.00 159 97% 164 downrated 1
wiki_modern_life 821.25 104 97% 107 downrated 1
wiki_arts 860.50 101 97% 104 downrated 1
wiki_society 747.43 115 97% 118 downrated 1
wiki_linguistics 511.07 233 97% 240 downrated 1
wiki_physical_science 597.49 174 97% 179 downrated 1
wiki_history 916.05 94 97% 97 downrated 1
early_modern_science 1548.60 74 97% 76 downrated 1
religious_translated 1560.15 78 97% 80 downrated 1
cooking 1567.32 101 97% 104 downrated 1
legal_scotus 739.57 135 97% 139 downrated 1
eu_parliament_debates 1347.85 82 97% 84 downrated 1
openstax_science 772.20 121 97% 125 downrated 1
openstax_society 1001.63 100 97% 103 downrated 1
wpa_life_histories 4317.60 29 97% 30 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.