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: 145 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Movers (2 of 3) 750
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 311.42 336 100% 336 1
20th_books 297.39 358 100% 358 1
wiki_math 1122.86 105 100% 105 1
wiki_geography 491.38 220 100% 220 1
wiki_biology 1566.83 59 100% 59 1
wiki_modern_life 1765.52 51 100% 51 1
wiki_arts 1479.37 63 100% 63 1
wiki_society 1361.92 60 100% 60 1
wiki_linguistics 1432.40 77 100% 77 1
wiki_physical_science 1118.88 80 100% 80 1
wiki_history 564.14 165 100% 165 1
early_modern_science 573.43 184 100% 184 1
religious_translated 188.35 579 100% 579 1
cooking 361.62 428 100% 428 1
legal_scotus 220.53 574 100% 574 1
eu_parliament_debates 314.40 397 100% 397 1
openstax_science 736.39 129 100% 129 1
openstax_society 1283.61 79 100% 79 1
wpa_life_histories 324.40 352 100% 352 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.