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: 7418 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B1 (3 of 6) 4200

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 2.54 5321 10% 20000 capped 2
20th_books 2.23 5748 10% 20000 capped 2
wiki_math 0.00 — — — 0
wiki_geography 24.59 1539 10% 5684 downrated 4
wiki_biology 18.59 1409 10% 7368 downrated 3
wiki_modern_life 28.37 1070 10% 5067 downrated 4
wiki_arts 8.25 3215 10% 10000 capped 2
wiki_society 28.84 1167 10% 4815 downrated 4
wiki_linguistics 11.48 2593 10% 9000 capped 3
wiki_physical_science 16.39 1673 10% 8000 capped 3
wiki_history 21.68 1220 10% 6174 downrated 3
early_modern_science 6.22 3160 10% 10400 capped 2
religious_translated 7.50 2655 10% 10400 capped 3
cooking 0.00 — — — 0
legal_scotus 21.63 1535 10% 5544 downrated 4
eu_parliament_debates 22.21 1107 10% 4808 downrated 4
openstax_science 38.42 700 10% 3558 downrated 4
openstax_society 30.27 814 10% 4602 downrated 3
wpa_life_histories 2.01 5647 10% 20000 capped 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.