Base Difficulty

Base difficulty: Level 19 edit

Level distribution for adverb (style): 6: 1 19: 4 20: 4 105: 46 1080: 1 1202: 1 1399: 2

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: 254 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 1009.14 127 100% 127 1
20th_books 1408.50 85 100% 85 1
wiki_math 358.16 399 100% 399 1
wiki_geography 247.15 504 100% 504 1
wiki_biology 242.46 518 100% 518 1
wiki_modern_life 253.32 471 100% 471 1
wiki_arts 320.42 337 100% 337 1
wiki_society 272.56 417 100% 417 1
wiki_linguistics 254.13 518 100% 518 1
wiki_physical_science 246.11 562 100% 562 1
wiki_history 310.88 362 100% 362 1
early_modern_science 465.27 217 100% 217 1
religious_translated 240.17 458 100% 458 1
cooking 840.41 190 100% 190 1
legal_scotus 441.68 262 100% 262 1
eu_parliament_debates 969.41 113 100% 113 1
openstax_science 537.86 199 100% 199 1
openstax_society 565.81 195 100% 195 1
wpa_life_histories 1828.59 79 100% 79 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.