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: 191 (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 Movers (2 of 3) 750
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 345.35 179 50% 358 downrated 1
20th_books 308.25 199 50% 398 downrated 1
wiki_math 390.93 170 50% 340 downrated 1
wiki_geography 1087.92 32 50% 64 downrated 1
wiki_biology 1248.03 42 50% 84 downrated 1
wiki_modern_life 870.68 50 50% 100 downrated 1
wiki_arts 837.00 54 50% 108 downrated 1
wiki_society 700.68 57 50% 114 downrated 1
wiki_linguistics 1052.54 49 50% 98 downrated 1
wiki_physical_science 844.90 52 50% 104 downrated 1
wiki_history 656.09 66 50% 132 downrated 1
early_modern_science 719.69 81 50% 162 downrated 1
religious_translated 299.64 205 50% 410 downrated 1
cooking 183.67 417 50% 834 downrated 1
legal_scotus 242.26 234 50% 468 downrated 1
eu_parliament_debates 317.13 199 50% 398 downrated 1
openstax_science 670.99 70 50% 140 downrated 1
openstax_society 711.40 74 50% 148 downrated 1
wpa_life_histories 374.77 164 50% 328 downrated 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.