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: 8644 (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 7.52 2266 11% 11095 downrated 3
20th_books 7.79 1934 11% 10477 downrated 3
wiki_math 10.79 1490 11% 8000 capped 2
wiki_geography 0.00 — — — 0
wiki_biology 17.22 1211 11% 8051 downrated 2
wiki_modern_life 11.35 1827 11% 10000 capped 2
wiki_arts 4.51 3334 11% 10000 capped 1
wiki_society 14.03 1837 11% 9739 downrated 3
wiki_linguistics 11.00 1658 11% 9000 capped 2
wiki_physical_science 16.79 1563 11% 8000 capped 3
wiki_history 6.54 2326 11% 9000 capped 1
early_modern_science 7.32 2142 11% 10400 capped 2
religious_translated 8.25 1966 11% 10400 capped 2
cooking 3.76 2269 11% 5200 capped 1
legal_scotus 26.04 1079 11% 4756 downrated 4
eu_parliament_debates 9.38 1927 11% 9779 downrated 3
openstax_science 21.87 1256 7% 6185 downrated 3
openstax_society 14.47 1939 11% 9049 downrated 3
wpa_life_histories 9.31 1758 7% 9255 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.