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: 247 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 245.23 423 100% 423 1
20th_books 314.01 343 100% 343 1
wiki_math 324.77 427 100% 427 1
wiki_geography 1135.15 78 100% 78 1
wiki_biology 974.12 98 100% 98 1
wiki_modern_life 817.67 107 100% 107 1
wiki_arts 654.26 150 100% 150 1
wiki_society 477.59 204 100% 204 1
wiki_linguistics 515.19 238 100% 238 1
wiki_physical_science 819.05 117 100% 117 1
wiki_history 604.26 157 100% 157 1
early_modern_science 221.25 488 100% 488 1
religious_translated 95.91 1070 100% 1070 1
cooking 487.80 316 100% 316 1
legal_scotus 49.16 2359 100% 2359 1
eu_parliament_debates 166.49 711 100% 711 1
openstax_science 515.02 206 100% 206 1
openstax_society 642.22 176 100% 176 1
wpa_life_histories 1250.48 115 100% 115 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.