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: 358 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr A2 (2 of 6) 2100

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 39.66 2357 80% 2079 2
20th_books 36.85 3098 80% 2149 2
wiki_math 450.87 737 80% 293 4
wiki_geography 489.20 723 80% 271 4
wiki_biology 485.21 440 80% 272 4
wiki_modern_life 818.06 194 80% 134 4
wiki_arts 327.46 1006 80% 417 4
wiki_society 570.87 415 80% 219 4
wiki_linguistics 256.24 1273 80% 495 4
wiki_physical_science 465.27 657 80% 310 4
wiki_history 321.67 605 80% 399 4
early_modern_science 79.58 1490 80% 1387 2
religious_translated 71.85 1575 80% 1350 2
cooking 47.78 1596 80% 1995 downrated 1
legal_scotus 1278.59 206 80% 89 5
eu_parliament_debates 701.87 364 80% 172 5
openstax_science 789.97 341 80% 165 4
openstax_society 818.13 259 80% 155 4
wpa_life_histories 48.22 2880 80% 1637 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.