Base Difficulty

Base difficulty: Level 225 edit

Level distribution for adverb (definite_frequency): 225: 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: 2133 (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 56.82 1613 100% 1613 1
20th_books 42.06 2045 100% 2045 1
wiki_math 0.00 — — — 0
wiki_geography 155.98 855 100% 855 1
wiki_biology 51.93 2616 100% 2616 1
wiki_modern_life 73.75 2020 100% 2020 1
wiki_arts 61.53 2249 100% 2249 1
wiki_society 97.95 1441 100% 1441 1
wiki_linguistics 66.73 1900 100% 1900 1
wiki_physical_science 45.47 2930 100% 2930 1
wiki_history 52.50 2600 100% 2600 1
early_modern_science 62.62 1820 100% 1820 1
religious_translated 84.31 1222 100% 1222 1
cooking 37.18 2127 100% 2127 1
legal_scotus 24.89 3916 100% 3916 1
eu_parliament_debates 55.11 1922 100% 1922 1
openstax_science 59.81 2196 100% 2196 1
openstax_society 108.62 1286 100% 1286 1
wpa_life_histories 50.56 1785 100% 1785 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.