Base Difficulty

Base difficulty: Level 10 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: 4 27: 3 28: 2 29: 4 109: 1 135: 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: 1 279: 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 1090: 12 1110: 1 1120: 2 1201: 1 1205: 1 1210: 1 1221: 1

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-1299 for level
Frequency and Tier Signals
Combined Frequency Rank: — (run python -m storage.admin --calc-ranks to populate)
Tier Signals
Source Tier Rank used
cambridge_yle Starters (1 of 3) 325

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 339.94 274 17% 306 downrated 2
20th_books 337.57 278 17% 314 downrated 2
wiki_math 103.19 210 17% 1260 downrated 1
wiki_geography 413.28 285 100% 261 2
wiki_biology 57.35 334 17% 2004 downrated 1
wiki_modern_life 203.63 263 17% 614 downrated 2
wiki_arts 210.71 505 17% 584 downrated 2
wiki_society 111.30 639 17% 1179 downrated 2
wiki_linguistics 66.20 468 17% 1677 downrated 2
wiki_physical_science 29.98 800 17% 4800 downrated 1
wiki_history 179.50 736 17% 673 2
early_modern_science 123.09 386 17% 904 downrated 2
religious_translated 134.77 638 17% 758 downrated 2
cooking 74.26 643 17% 1340 downrated 2
legal_scotus 47.49 700 17% 2257 downrated 2
eu_parliament_debates 76.56 520 17% 1381 downrated 2
openstax_science 53.61 740 17% 2312 downrated 2
openstax_society 76.05 953 17% 1775 downrated 2
wpa_life_histories 175.24 418 17% 594 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.