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: 1049 (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 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 149.78 382 50% 659 downrated 3
20th_books 205.38 300 50% 517 downrated 3
wiki_math 46.07 1593 50% 2175 downrated 2
wiki_geography 16.85 3990 50% 7980 downrated 1
wiki_biology 91.68 742 50% 1484 downrated 1
wiki_modern_life 108.27 743 50% 1247 downrated 2
wiki_arts 51.55 1328 50% 2656 downrated 1
wiki_society 33.06 2099 50% 4198 downrated 1
wiki_linguistics 35.50 1795 50% 3590 downrated 1
wiki_physical_science 59.97 1228 50% 2456 downrated 1
wiki_history 39.27 1737 50% 3474 downrated 1
early_modern_science 93.36 581 50% 1162 downrated 1
religious_translated 76.19 711 50% 1422 downrated 1
cooking 405.56 199 50% 398 downrated 1
legal_scotus 35.51 1942 50% 3128 downrated 2
eu_parliament_debates 68.59 946 50% 1607 downrated 2
openstax_science 51.92 1652 50% 2485 downrated 2
openstax_society 101.80 844 50% 1358 downrated 2
wpa_life_histories 298.66 216 50% 386 downrated 3

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.