Base Difficulty

Base difficulty: Level 162 edit

Level distribution for verb (change): 22: 4 28: 1 109: 1 140: 1 162: 2 194: 1 254: 1 255: 1 309: 2 311: 1 321: 16 410: 2 415: 2 475: 5 1040: 1 1090: 1 1399: 38

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: 490 (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 37.84 5240 100% 1841 3
20th_books 48.59 3857 100% 1495 3
wiki_math 758.76 263 100% 171 4
wiki_geography 318.98 864 100% 428 3
wiki_biology 252.92 751 100% 527 3
wiki_modern_life 508.39 382 100% 245 4
wiki_arts 148.67 893 100% 893 1
wiki_society 355.29 515 100% 356 3
wiki_linguistics 218.19 682 100% 586 2
wiki_physical_science 478.42 706 100% 297 4
wiki_history 151.78 1091 100% 859 2
early_modern_science 213.38 1489 100% 541 3
religious_translated 57.30 2746 100% 1542 2
cooking 36.06 2173 100% 2173 1
legal_scotus 1023.66 278 100% 119 4
eu_parliament_debates 334.02 1001 100% 343 4
openstax_science 288.84 1137 100% 466 4
openstax_society 489.43 527 100% 276 4
wpa_life_histories 37.64 5049 100% 1853 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.