Base Difficulty

Base difficulty: Level 23 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: 510 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 548.02 214 100% 214 1
20th_books 527.74 230 100% 230 1
wiki_math 139.74 957 100% 957 1
wiki_geography 60.31 2327 100% 2327 1
wiki_biology 177.52 762 100% 762 1
wiki_modern_life 207.18 610 100% 610 1
wiki_arts 100.43 1371 100% 1371 1
wiki_society 95.85 1483 100% 1483 1
wiki_linguistics 87.06 1478 100% 1478 1
wiki_physical_science 337.36 392 100% 392 1
wiki_history 140.98 942 100% 942 1
early_modern_science 331.85 323 100% 323 1
religious_translated 92.91 1113 100% 1113 1
cooking 975.84 164 100% 164 1
legal_scotus 181.54 709 100% 709 1
eu_parliament_debates 237.98 518 100% 518 1
openstax_science 307.13 419 100% 419 1
openstax_society 213.30 654 100% 654 1
wpa_life_histories 561.09 212 100% 212 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.