Base Difficulty

Base difficulty: Level 321 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: 1668 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B2 (4 of 6) 6900

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 48.50 1588 66% 1734 downrated 2
20th_books 34.32 2371 66% 2236 2
wiki_math 100.79 1168 66% 1100 2
wiki_geography 25.69 3488 66% 5284 downrated 1
wiki_biology 56.73 1629 66% 2468 downrated 1
wiki_modern_life 164.55 582 66% 769 downrated 2
wiki_arts 133.29 629 66% 953 downrated 1
wiki_society 32.73 2823 66% 4277 downrated 1
wiki_linguistics 209.02 750 66% 599 3
wiki_physical_science 130.13 730 66% 1106 downrated 1
wiki_history 40.62 2225 66% 3371 downrated 1
early_modern_science 99.45 740 66% 1121 downrated 1
religious_translated 38.04 1731 66% 2622 downrated 1
cooking 257.73 439 66% 526 downrated 2
legal_scotus 20.17 3413 66% 5171 downrated 1
eu_parliament_debates 37.64 1865 66% 2825 downrated 1
openstax_science 123.09 762 66% 1154 downrated 1
openstax_society 44.35 3204 66% 2546 2
wpa_life_histories 42.52 1699 66% 1951 downrated 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.