Base Difficulty

Base difficulty: Level 254 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: 2403 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr A2 (2 of 6) 2100

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 116.61 275 16% 882 downrated 5
20th_books 91.46 326 16% 1127 downrated 4
wiki_math 24.08 1612 16% 4207 downrated 3
wiki_geography 57.50 1057 16% 2420 downrated 4
wiki_biology 34.54 1993 16% 3911 downrated 4
wiki_modern_life 59.58 1113 16% 2458 downrated 4
wiki_arts 27.72 2452 16% 4914 downrated 4
wiki_society 31.13 1204 16% 4417 downrated 3
wiki_linguistics 13.94 2222 16% 8276 downrated 2
wiki_physical_science 47.85 1581 16% 3005 downrated 4
wiki_history 40.45 866 16% 3281 downrated 3
early_modern_science 130.43 410 16% 842 downrated 4
religious_translated 112.24 343 16% 945 downrated 5
cooking 31.27 890 16% 3570 downrated 2
legal_scotus 40.64 1117 16% 2997 downrated 4
eu_parliament_debates 21.56 1718 16% 4622 downrated 3
openstax_science 69.40 978 16% 2015 downrated 4
openstax_society 62.17 657 16% 2180 downrated 4
wpa_life_histories 52.28 623 16% 1920 downrated 4

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.