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: 1117 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 11.76 3357 33% 6188 downrated 2
20th_books 18.79 1980 33% 4181 downrated 2
wiki_math 116.13 488 33% 1084 downrated 2
wiki_geography 215.89 246 33% 540 downrated 2
wiki_biology 156.50 425 33% 797 downrated 4
wiki_modern_life 338.79 166 33% 324 downrated 4
wiki_arts 83.57 779 33% 1585 downrated 2
wiki_society 188.71 294 33% 624 downrated 4
wiki_linguistics 39.15 2038 33% 3002 downrated 2
wiki_physical_science 108.81 723 33% 1329 downrated 2
wiki_history 207.61 222 33% 512 downrated 2
early_modern_science 13.03 2750 33% 8250 downrated 1
religious_translated 48.25 1253 33% 1957 downrated 3
cooking 0.00 — — — 0
legal_scotus 174.54 446 33% 705 downrated 4
eu_parliament_debates 156.84 411 33% 723 downrated 4
openstax_science 213.27 359 33% 603 downrated 4
openstax_society 297.22 185 33% 401 downrated 4
wpa_life_histories 13.31 2622 33% 5355 downrated 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.