Base Difficulty

Base difficulty: Level 26 edit

Level distribution for adverb (adverb_other): 26: 3 29: 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, 1-36 for level
Frequency and Tier Signals
Combined Frequency Rank: 278 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Starters (1 of 3) 325

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 1458.71 83 100% 83 1
20th_books 1317.93 97 100% 97 1
wiki_vital 157.13 791 100% 791 1
wiki_math 160.62 829 100% 829 1
wiki_geography 229.22 509 100% 509 1
wiki_biology 124.12 1122 100% 1122 1
wiki_modern_life 140.78 994 100% 994 1
early_modern_science 588.45 177 100% 177 1
religious_translated 763.03 165 100% 165 1
cooking 563.11 271 100% 271 1
legal_scotus 182.79 707 100% 707 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.