Base Difficulty

Base difficulty: Level 299 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: 526 (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 Flyers (3 of 3) 1200
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 148.95 922 80% 592 4
20th_books 130.96 1050 80% 669 4
wiki_math 95.86 2326 100% 950 3
wiki_geography 78.49 2642 80% 1749 2
wiki_biology 171.02 1336 80% 790 3
wiki_modern_life 178.58 1274 80% 815 3
wiki_arts 398.76 718 80% 333 4
wiki_society 420.27 388 80% 289 3
wiki_linguistics 150.91 1031 80% 852 2
wiki_physical_science 290.02 1080 80% 503 3
wiki_history 296.36 991 80% 456 4
early_modern_science 314.53 648 80% 358 4
religious_translated 448.88 332 80% 235 4
cooking 0.00 — — — 0
legal_scotus 629.86 345 80% 197 4
eu_parliament_debates 301.96 578 80% 372 4
openstax_science 273.13 1000 80% 510 3
openstax_society 382.86 474 80% 343 4
wpa_life_histories 129.92 1132 80% 688 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.