Base Difficulty

Base difficulty: Level 1399 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: 1907 (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 23.20 5652 100% 2941 2
20th_books 21.24 4902 100% 3052 2
wiki_math 145.11 1456 100% 704 3
wiki_geography 44.45 3076 100% 3076 1
wiki_biology 65.90 2070 100% 2070 1
wiki_modern_life 106.24 2126 100% 1374 2
wiki_arts 67.75 2052 100% 2052 1
wiki_society 75.61 2830 100% 1787 2
wiki_linguistics 28.30 3605 100% 3605 1
wiki_physical_science 34.73 3615 100% 3615 1
wiki_history 65.38 2108 100% 2108 1
early_modern_science 34.16 3057 100% 3057 1
religious_translated 15.86 4764 100% 4764 1
cooking 270.37 594 100% 454 2
legal_scotus 88.82 2810 100% 1174 3
eu_parliament_debates 13.70 4701 100% 4701 1
openstax_science 139.55 2045 100% 904 3
openstax_society 89.62 2752 100% 1425 2
wpa_life_histories 24.25 3871 100% 2682 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.