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: 694 (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 501.67 231 100% 231 1
20th_books 533.16 228 100% 228 1
wiki_math 59.89 1788 100% 1788 1
wiki_geography 56.33 2466 100% 2466 1
wiki_biology 116.39 1200 100% 1200 1
wiki_modern_life 82.09 1800 100% 1800 1
wiki_arts 168.88 769 100% 769 1
wiki_society 100.41 1402 100% 1402 1
wiki_linguistics 140.41 933 100% 933 1
wiki_physical_science 75.46 1907 100% 1907 1
wiki_history 153.45 846 100% 846 1
early_modern_science 511.57 202 100% 202 1
religious_translated 69.62 1477 100% 1477 1
cooking 94.63 1191 100% 1191 1
legal_scotus 154.37 849 100% 849 1
eu_parliament_debates 302.93 408 100% 408 1
openstax_science 115.05 1225 100% 1225 1
openstax_society 226.74 617 100% 617 1
wpa_life_histories 143.44 722 100% 722 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.