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: 1872 (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 12.92 5445 100% 5445 1
20th_books 21.66 3607 100% 3607 1
wiki_math 33.40 2655 100% 2655 1
wiki_geography 151.26 885 100% 885 1
wiki_biology 194.47 685 100% 685 1
wiki_modern_life 109.02 1357 100% 1357 1
wiki_arts 91.64 1517 100% 1517 1
wiki_society 88.63 1600 100% 1600 1
wiki_linguistics 116.92 1112 100% 1112 1
wiki_physical_science 96.95 1500 100% 1500 1
wiki_history 78.40 1740 100% 1740 1
early_modern_science 67.17 1710 100% 1710 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 50.38 2323 100% 2323 1
eu_parliament_debates 169.78 695 100% 695 1
openstax_science 84.31 1639 100% 1639 1
openstax_society 101.19 1376 100% 1376 1
wpa_life_histories 46.44 1909 100% 1909 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.