Base Difficulty

Base difficulty: Level 162 edit

Level distribution for noun (quantitative_concept): 20: 1 26: 1 162: 20 276: 22 380: 20 390: 1 456: 1 460: 1 1000: 1 1050: 2 1070: 2 1080: 5 1090: 1 1110: 1 1120: 1 1202: 2 1203: 1 1204: 2 1206: 1 1210: 2 1211: 1 1213: 7 1218: 1 1225: 2 1226: 1 1399: 21

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: 131 (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 Starters (1 of 3) 325
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 117.47 947 100% 781 2
20th_books 128.93 923 100% 734 2
wiki_math 7254.26 27 100% 15 2
wiki_geography 961.59 122 100% 107 2
wiki_biology 977.70 129 100% 106 2
wiki_modern_life 1073.34 98 100% 87 2
wiki_arts 749.51 153 100% 137 2
wiki_society 749.27 146 100% 132 2
wiki_linguistics 1521.02 86 100% 73 2
wiki_physical_science 1239.57 86 100% 76 2
wiki_history 653.85 179 100% 153 2
early_modern_science 781.78 159 100% 130 2
religious_translated 264.73 463 100% 405 2
cooking 166.73 757 100% 757 1
legal_scotus 313.81 452 100% 388 2
eu_parliament_debates 674.34 203 100% 187 2
openstax_science 1376.42 84 100% 72 2
openstax_society 832.61 157 100% 135 2
wpa_life_histories 271.33 466 100% 389 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.