Base Difficulty

Base difficulty: Level 175 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: 442 (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 62.24 2393 80% 1258 4
20th_books 45.10 2688 80% 1673 3
wiki_math 576.52 491 80% 232 4
wiki_geography 314.87 578 80% 420 4
wiki_biology 910.96 244 80% 126 4
wiki_modern_life 529.86 516 80% 246 4
wiki_arts 412.30 571 80% 319 4
wiki_society 232.73 1510 80% 606 4
wiki_linguistics 360.29 675 80% 360 4
wiki_physical_science 882.75 337 80% 152 4
wiki_history 221.98 1418 80% 607 4
early_modern_science 425.25 699 80% 268 4
religious_translated 150.05 1818 80% 643 4
cooking 330.84 785 80% 367 3
legal_scotus 272.01 1111 80% 467 4
eu_parliament_debates 182.65 1380 80% 583 4
openstax_science 903.01 282 80% 139 4
openstax_society 84.33 3151 80% 1429 3
wpa_life_histories 38.90 4543 80% 1787 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.