Base Difficulty

Base difficulty: Level 23 edit

Level distribution for adverb (intensity): 23: 7 105: 6 1399: 4

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: 54 (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 Flyers (3 of 3) 1200
cefr A1 (1 of 6) 800

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 2660.35 64 50% 49 3
20th_books 2394.05 70 50% 53 3
wiki_math 1726.90 60 50% 70 downrated 3
wiki_geography 2482.69 32 50% 32 3
wiki_biology 3204.57 39 50% 32 3
wiki_modern_life 3000.79 36 50% 31 3
wiki_arts 2563.87 46 50% 37 3
wiki_society 2190.85 45 50% 40 3
wiki_linguistics 2720.65 44 50% 39 3
wiki_physical_science 2862.67 40 50% 32 3
wiki_history 2038.37 60 50% 44 3
early_modern_science 3733.76 45 50% 32 3
religious_translated 1523.70 101 50% 81 3
cooking 1614.34 119 50% 99 3
legal_scotus 1238.73 78 50% 88 downrated 3
eu_parliament_debates 2251.79 52 50% 52 3
openstax_science 2765.31 38 50% 34 3
openstax_society 3148.11 32 50% 31 3
wpa_life_histories 2415.28 99 50% 58 3

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.