Base Difficulty

Base difficulty: Level 255 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: 1305 (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 148.24 233 10% 644 downrated 4
20th_books 173.76 244 10% 563 downrated 4
wiki_math 7.85 1471 10% 8000 capped 1
wiki_geography 10.39 1329 10% 9000 capped 1
wiki_biology 44.67 243 10% 2430 downrated 1
wiki_modern_life 223.60 131 10% 546 downrated 4
wiki_arts 129.67 484 10% 1016 downrated 4
wiki_society 43.88 900 10% 3000 downrated 2
wiki_linguistics 91.25 1528 100% 1403 2
wiki_physical_science 129.52 68 10% 680 downrated 1
wiki_history 17.20 750 10% 7500 downrated 1
early_modern_science 132.47 97 10% 822 downrated 2
religious_translated 192.25 203 10% 563 downrated 3
cooking 82.03 196 10% 1960 downrated 1
legal_scotus 32.32 444 10% 3400 downrated 2
eu_parliament_debates 13.29 899 10% 8990 downrated 1
openstax_science 145.63 74 10% 674 downrated 2
openstax_society 11.57 1221 10% 11000 capped 1
wpa_life_histories 172.27 554 10% 572 downrated 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.