Base Difficulty

Base difficulty: Level 319 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: 835 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Flyers (3 of 3) 1200
cefr A2 (2 of 6) 2100

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 28.34 2733 80% 2864 downrated 2
20th_books 31.33 2510 80% 2558 downrated 2
wiki_math 49.75 1744 80% 2180 downrated 1
wiki_geography 101.57 1326 80% 1360 downrated 2
wiki_biology 119.54 1060 80% 1154 downrated 2
wiki_modern_life 173.79 1050 80% 822 3
wiki_arts 91.29 1480 80% 1512 downrated 2
wiki_society 62.05 2166 80% 2196 downrated 2
wiki_linguistics 122.45 1157 80% 967 3
wiki_physical_science 199.17 1210 80% 727 3
wiki_history 49.40 2216 80% 2770 downrated 1
early_modern_science 121.63 1118 80% 908 3
religious_translated 21.66 3200 80% 4000 downrated 1
cooking 1955.31 61 44% 76 downrated 3
legal_scotus 26.04 3644 80% 3582 2
eu_parliament_debates 21.10 3749 80% 3354 2
openstax_science 81.40 2415 80% 1470 3
openstax_society 43.72 2935 80% 2772 2
wpa_life_histories 55.37 1820 80% 1457 3

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.