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: 2511 (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 19.78 3895 50% 3961 downrated 2
20th_books 14.20 5608 50% 4378 3
wiki_math 80.04 1843 50% 1185 4
wiki_geography 48.11 2362 50% 2871 downrated 2
wiki_biology 55.69 1753 50% 2407 downrated 2
wiki_modern_life 42.43 3076 50% 3375 downrated 2
wiki_arts 51.06 1965 50% 2652 downrated 2
wiki_society 40.80 3027 50% 3383 downrated 2
wiki_linguistics 125.46 916 50% 971 downrated 4
wiki_physical_science 21.24 3098 50% 6196 downrated 1
wiki_history 49.51 2121 50% 2735 downrated 2
early_modern_science 55.98 1802 50% 1889 downrated 3
religious_translated 67.20 1237 50% 1502 downrated 2
cooking 169.55 1119 50% 642 4
legal_scotus 69.50 1815 50% 1564 4
eu_parliament_debates 22.46 2844 50% 3543 downrated 2
openstax_science 19.52 4909 50% 5155 downrated 2
openstax_society 48.94 2506 50% 2466 3
wpa_life_histories 12.47 5653 50% 4620 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.