Base Difficulty

Base difficulty: Level 29 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: 1606 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cambridge_yle Flyers (3 of 3) 1200

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 90.31 1023 100% 1023 1
20th_books 104.49 916 100% 916 1
wiki_vital 53.61 2551 100% 2551 1
wiki_math 89.36 1332 100% 1332 1
wiki_geography 62.36 2081 100% 2081 1
wiki_biology 51.87 2615 100% 2615 1
wiki_modern_life 69.10 2121 100% 2121 1
early_modern_science 97.44 1167 100% 1167 1
religious_translated 46.47 2035 100% 2035 1
cooking 117.83 1005 100% 1005 1
legal_scotus 37.47 2873 100% 2873 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.