Base Difficulty

Base difficulty: Level 475 edit

Level distribution for verb (physical_action): 5: 8 7: 3 8: 4 10: 5 11: 1 12: 1 19: 1 22: 1 23: 1 24: 2 25: 5 27: 3 28: 2 29: 4 109: 2 135: 1 140: 3 160: 3 165: 1 170: 1 172: 1 179: 2 185: 1 190: 2 194: 1 196: 1 204: 5 205: 3 215: 1 235: 1 254: 1 278: 4 279: 4 299: 1 300: 1 309: 2 311: 1 314: 2 319: 41 330: 3 340: 1 370: 1 400: 1 405: 4 406: 3 410: 2 415: 8 455: 1 475: 9 485: 1 1020: 1 1040: 3 1070: 3 1078: 10 1090: 12 1110: 1 1120: 2 1201: 1 1205: 1 1210: 1 1221: 1 1399: 72

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: 2714 (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 7.49 3636 17% 9805 downrated 3
20th_books 4.73 4505 17% 14721 downrated 2
wiki_math 143.59 289 17% 941 downrated 4
wiki_geography 9.48 2444 17% 9000 capped 1
wiki_biology 17.62 1321 17% 7926 downrated 1
wiki_modern_life 75.96 388 17% 1618 downrated 4
wiki_arts 34.74 753 17% 3747 downrated 2
wiki_society 63.11 704 17% 2124 downrated 4
wiki_linguistics 58.67 772 17% 2161 downrated 4
wiki_physical_science 77.19 438 17% 1750 downrated 4
wiki_history 15.42 1442 17% 8652 downrated 1
early_modern_science 46.01 815 17% 2409 downrated 4
religious_translated 15.26 1788 17% 5890 downrated 3
cooking 17.84 1460 17% 5111 downrated 2
legal_scotus 226.85 227 17% 520 downrated 5
eu_parliament_debates 89.61 602 17% 1320 downrated 4
openstax_science 56.31 775 17% 2407 downrated 4
openstax_society 42.03 1484 17% 3161 downrated 4
wpa_life_histories 4.11 4375 17% 16884 downrated 2

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.