Base Difficulty

Base difficulty: Level 105 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: 558 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Flyers (3 of 3) 1200
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 162.17 612 100% 612 1
20th_books 155.21 653 100% 653 1
wiki_math 362.77 392 100% 392 1
wiki_geography 114.13 1212 100% 1212 1
wiki_biology 242.10 519 100% 519 1
wiki_modern_life 324.93 333 100% 333 1
wiki_arts 293.26 380 100% 380 1
wiki_society 293.13 388 100% 388 1
wiki_linguistics 537.62 225 100% 225 1
wiki_physical_science 276.60 501 100% 501 1
wiki_history 291.03 393 100% 393 1
early_modern_science 243.26 448 100% 448 1
religious_translated 64.59 1579 100% 1579 1
cooking 239.95 573 100% 573 1
legal_scotus 322.71 380 100% 380 1
eu_parliament_debates 165.32 713 100% 713 1
openstax_science 212.24 662 100% 662 1
openstax_society 367.57 334 100% 334 1
wpa_life_histories 113.24 885 100% 885 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.