Base Difficulty

Base difficulty: Level 254 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: 917 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B2 (4 of 6) 6900

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 106.15 1078 100% 853 2
20th_books 88.55 1256 100% 1018 2
wiki_math 34.65 2603 100% 2603 1
wiki_geography 140.51 967 100% 967 1
wiki_biology 329.05 437 100% 378 2
wiki_modern_life 176.26 768 100% 768 1
wiki_arts 132.81 1013 100% 1013 1
wiki_society 151.21 887 100% 887 1
wiki_linguistics 234.85 638 100% 545 2
wiki_physical_science 121.74 1816 100% 1148 2
wiki_history 150.04 869 100% 869 1
early_modern_science 132.13 1115 100% 856 2
religious_translated 123.88 952 100% 803 2
cooking 766.25 218 100% 218 1
legal_scotus 10.73 6654 100% 6654 1
eu_parliament_debates 54.82 2408 100% 1570 2
openstax_science 239.80 783 100% 560 3
openstax_society 202.96 773 100% 678 2
wpa_life_histories 73.72 1444 100% 1243 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.