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: 378 (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 Movers (2 of 3) 750
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 420.71 313 100% 242 4
20th_books 490.04 304 100% 211 5
wiki_math 62.19 1740 100% 1740 1
wiki_geography 175.19 1347 100% 798 2
wiki_biology 359.21 524 100% 359 3
wiki_modern_life 321.51 606 100% 412 3
wiki_arts 310.28 791 100% 429 3
wiki_society 375.60 562 100% 346 4
wiki_linguistics 153.22 1321 100% 767 3
wiki_physical_science 161.91 1297 100% 881 2
wiki_history 448.18 566 100% 276 3
early_modern_science 101.33 1382 100% 1087 2
religious_translated 263.18 473 100% 401 2
cooking 95.76 1181 100% 1181 1
legal_scotus 155.79 1295 100% 689 5
eu_parliament_debates 601.82 298 100% 189 5
openstax_science 594.76 358 100% 217 4
openstax_society 840.05 236 100% 148 5
wpa_life_histories 782.86 243 100% 144 5

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.