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: 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: 326 (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 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 790.80 292 100% 131 5
20th_books 778.81 294 100% 137 4
wiki_math 69.10 3047 100% 1109 3
wiki_geography 96.55 2652 100% 1420 2
wiki_biology 363.86 781 100% 378 3
wiki_modern_life 354.64 793 100% 400 3
wiki_arts 196.38 1583 100% 702 3
wiki_society 182.18 1694 100% 770 3
wiki_linguistics 108.91 2737 100% 1017 3
wiki_physical_science 146.42 2164 100% 924 3
wiki_history 274.39 996 100% 485 3
early_modern_science 423.15 646 100% 259 4
religious_translated 589.02 367 100% 179 5
cooking 1081.49 276 100% 127 5
legal_scotus 109.26 2291 100% 929 4
eu_parliament_debates 300.59 737 100% 367 4
openstax_science 286.58 859 100% 467 4
openstax_society 365.92 698 100% 375 4
wpa_life_histories 1145.47 213 100% 102 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.