Base Difficulty

Base difficulty: Level 321 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: 343 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Movers (2 of 3) 750
cefr A1 (1 of 6) 800

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 253.38 498 44% 374 4
20th_books 239.34 619 44% 406 4
wiki_math 355.99 378 44% 357 4
wiki_geography 275.45 949 44% 497 4
wiki_biology 290.41 564 44% 460 4
wiki_modern_life 434.74 461 44% 302 4
wiki_arts 409.77 598 44% 320 4
wiki_society 394.22 380 44% 324 4
wiki_linguistics 701.87 222 44% 178 4
wiki_physical_science 665.94 189 44% 185 4
wiki_history 294.34 822 44% 447 4
early_modern_science 438.58 330 44% 251 4
religious_translated 184.29 688 44% 547 4
cooking 400.55 465 100% 327 4
legal_scotus 253.18 480 44% 485 downrated 4
eu_parliament_debates 341.02 438 44% 344 4
openstax_science 805.84 128 44% 130 downrated 4
openstax_society 768.96 175 44% 159 4
wpa_life_histories 191.89 775 44% 497 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.