Base Difficulty

Base difficulty: Level 28 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: 1414 (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 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 20.91 3647 20% 3503 3
20th_books 31.51 3861 20% 2214 4
wiki_math 0.00 — — — 0
wiki_geography 72.93 639 20% 1776 downrated 2
wiki_biology 673.98 75 20% 153 downrated 4
wiki_modern_life 143.28 379 20% 813 downrated 3
wiki_arts 11.83 4243 20% 10000 capped 2
wiki_society 22.00 2401 20% 6361 downrated 2
wiki_linguistics 4.41 4273 20% 9000 capped 1
wiki_physical_science 222.39 151 20% 494 downrated 2
wiki_history 17.20 3018 20% 7846 downrated 2
early_modern_science 133.42 249 20% 788 downrated 3
religious_translated 67.21 1672 20% 1443 3
cooking 29.07 1043 20% 3615 downrated 2
legal_scotus 16.39 2547 20% 6915 downrated 2
eu_parliament_debates 22.46 1810 20% 4728 downrated 2
openstax_science 205.64 171 20% 517 downrated 2
openstax_society 41.34 1229 20% 3389 downrated 2
wpa_life_histories 100.03 1035 20% 922 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.