Base Difficulty

Base difficulty: Level 23 edit

Level distribution for adverb (location): 18: 4 23: 22 250: 13 1070: 1 1120: 5 1205: 1 1221: 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: 629 (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 331.19 322 100% 322 1
20th_books 288.14 363 100% 363 1
wiki_math 123.23 1076 100% 1076 1
wiki_geography 128.95 1050 100% 1050 1
wiki_biology 109.59 1274 100% 1274 1
wiki_modern_life 127.19 1140 100% 1140 1
wiki_arts 174.45 743 100% 743 1
wiki_society 147.89 903 100% 903 1
wiki_linguistics 218.36 608 100% 608 1
wiki_physical_science 103.19 1419 100% 1419 1
wiki_history 226.72 522 100% 522 1
early_modern_science 344.21 312 100% 312 1
religious_translated 134.59 798 100% 798 1
cooking 72.10 1404 100% 1404 1
legal_scotus 235.30 540 100% 540 1
eu_parliament_debates 853.25 131 100% 131 1
openstax_science 130.83 1082 100% 1082 1
openstax_society 175.94 807 100% 807 1
wpa_life_histories 123.31 814 100% 814 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.