Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for verb (possession): 3: 3 7: 2 10: 1 20: 3 175: 14 254: 1 309: 1 314: 1 360: 1 406: 1 415: 3 455: 1 475: 3 1070: 1 1205: 1 1399: 28

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: 1257 (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 15.94 1762 17% 4644 downrated 4
20th_books 19.78 1853 17% 3597 downrated 5
wiki_math 98.17 408 17% 1191 downrated 2
wiki_geography 281.02 355 17% 425 downrated 6
wiki_biology 51.29 2997 100% 2606 2
wiki_modern_life 124.51 371 17% 1036 downrated 4
wiki_arts 133.59 1498 17% 1018 6
wiki_society 177.51 419 17% 709 downrated 5
wiki_linguistics 143.81 298 17% 827 downrated 4
wiki_physical_science 117.81 1477 17% 1233 3
wiki_history 205.05 295 17% 607 downrated 5
early_modern_science 21.96 1267 17% 5211 downrated 2
religious_translated 66.67 588 17% 1566 downrated 4
cooking 27.42 938 17% 3961 downrated 2
legal_scotus 308.97 83 17% 348 downrated 4
eu_parliament_debates 130.01 247 17% 823 downrated 5
openstax_science 47.79 1686 17% 2515 downrated 3
openstax_society 233.65 456 17% 570 downrated 6
wpa_life_histories 13.97 1873 17% 6105 downrated 3

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.