Base Difficulty

Base difficulty: Level 319 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: 577 (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 Starters (1 of 3) 325
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 393.56 474 100% 245 4
20th_books 505.39 381 100% 201 4
wiki_math 0.00 — — — 0
wiki_geography 88.73 2399 100% 1541 2
wiki_biology 37.96 3423 100% 3423 1
wiki_modern_life 160.54 1595 100% 894 3
wiki_arts 133.86 2002 100% 1011 3
wiki_society 70.16 3013 100% 1905 2
wiki_linguistics 573.39 390 100% 227 2
wiki_physical_science 45.23 2942 100% 2942 1
wiki_history 128.91 2037 100% 1067 2
early_modern_science 146.49 1424 100% 756 3
religious_translated 60.53 2291 100% 1473 2
cooking 38.30 2113 100% 2113 1
legal_scotus 148.10 1387 100% 752 4
eu_parliament_debates 151.09 921 100% 734 2
openstax_science 133.32 1756 100% 946 3
openstax_society 106.55 1736 100% 1228 2
wpa_life_histories 441.76 545 100% 232 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.