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: 628 (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 671.22 192 100% 180 2
20th_books 435.67 274 100% 257 2
wiki_math 32.25 2729 100% 2729 1
wiki_geography 112.83 1226 100% 1226 1
wiki_biology 77.71 1779 100% 1779 1
wiki_modern_life 114.37 1283 100% 1283 1
wiki_arts 160.05 820 100% 820 1
wiki_society 81.24 1736 100% 1736 1
wiki_linguistics 59.79 2093 100% 2093 1
wiki_physical_science 54.47 2552 100% 2552 1
wiki_history 330.16 341 100% 341 1
early_modern_science 358.06 316 100% 300 2
religious_translated 188.54 604 100% 570 2
cooking 301.92 486 100% 486 1
legal_scotus 34.90 3273 100% 2808 2
eu_parliament_debates 212.78 594 100% 555 2
openstax_science 54.82 2364 100% 2364 1
openstax_society 131.33 1087 100% 1087 1
wpa_life_histories 473.45 261 100% 252 2

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.