Base Difficulty

Base difficulty: Level 20 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: 1136 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 166.52 594 100% 594 1
20th_books 275.52 376 100% 376 1
wiki_math 0.00 — — — 0
wiki_geography 35.98 3772 100% 3772 1
wiki_biology 60.17 2281 100% 2281 1
wiki_modern_life 52.59 2792 100% 2792 1
wiki_arts 29.78 4381 100% 4381 1
wiki_society 0.00 — — — 0
wiki_linguistics 30.43 3437 100% 3437 1
wiki_physical_science 103.19 1420 100% 1420 1
wiki_history 31.87 4084 100% 4084 1
early_modern_science 141.56 799 100% 799 1
religious_translated 15.66 4807 100% 4807 1
cooking 852.80 187 100% 187 1
legal_scotus 0.00 — — — 0
eu_parliament_debates 14.44 4565 100% 4565 1
openstax_science 116.71 1527 100% 1119 2
openstax_society 42.95 2940 100% 2940 1
wpa_life_histories 54.68 1695 100% 1695 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.