Base Difficulty

Base difficulty: Level 28 edit

Level distribution for verb (change): 22: 4 28: 1 109: 1 140: 1 162: 2 194: 1 254: 1 255: 1 309: 2 311: 1 321: 16 410: 2 415: 2 475: 5 1040: 1 1090: 1 1399: 38

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: 448 (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 439.57 517 100% 218 5
20th_books 442.66 562 100% 225 5
wiki_math 69.87 2343 100% 1195 3
wiki_geography 410.02 733 50% 331 4
wiki_biology 1272.74 238 100% 90 5
wiki_modern_life 269.65 1136 50% 546 4
wiki_arts 166.84 1912 50% 816 4
wiki_society 202.85 1513 50% 690 4
wiki_linguistics 46.49 2723 50% 2267 2
wiki_physical_science 236.20 1318 100% 593 4
wiki_history 228.21 913 100% 577 3
early_modern_science 322.54 1013 100% 353 5
religious_translated 306.90 942 100% 330 5
cooking 78.88 1772 100% 1026 2
legal_scotus 25.50 5902 50% 2350 4
eu_parliament_debates 88.66 1325 50% 1059 3
openstax_science 352.43 753 100% 391 4
openstax_society 494.39 669 50% 281 5
wpa_life_histories 289.51 1101 100% 335 5

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.