Base Difficulty

Base difficulty: Level 105 edit

Level distribution for adverb (completeness): 23: 2 105: 3

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: 1421 (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 57.23 1591 100% 1591 1
20th_books 47.75 1845 100% 1845 1
wiki_math 54.28 1902 100% 1902 1
wiki_geography 84.31 1682 100% 1682 1
wiki_biology 166.69 818 100% 818 1
wiki_modern_life 142.77 982 100% 982 1
wiki_arts 121.91 1120 100% 1120 1
wiki_society 100.10 1409 100% 1409 1
wiki_linguistics 142.95 918 100% 918 1
wiki_physical_science 104.92 1398 100% 1398 1
wiki_history 91.50 1463 100% 1463 1
early_modern_science 141.62 797 100% 797 1
religious_translated 68.13 1500 100% 1500 1
cooking 40.57 2015 100% 2015 1
legal_scotus 97.95 1340 100% 1340 1
eu_parliament_debates 302.15 409 100% 409 1
openstax_science 88.94 1551 100% 1551 1
openstax_society 106.65 1304 100% 1304 1
wpa_life_histories 23.75 3371 100% 3371 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.