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: 378 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 42.59 2080 100% 2080 1
20th_books 43.12 2006 100% 2006 1
wiki_math 231.48 722 100% 548 2
wiki_geography 559.60 322 100% 215 2
wiki_biology 449.10 443 100% 285 2
wiki_modern_life 621.22 268 100% 176 2
wiki_arts 240.23 753 100% 550 2
wiki_society 576.42 306 100% 200 2
wiki_linguistics 376.92 483 100% 349 2
wiki_physical_science 758.08 295 100% 172 2
wiki_history 155.58 1268 100% 864 2
early_modern_science 139.66 810 100% 810 1
religious_translated 15.66 4792 100% 4792 1
cooking 473.15 330 100% 330 1
legal_scotus 203.34 812 100% 628 2
eu_parliament_debates 795.60 202 100% 158 2
openstax_science 823.20 221 100% 139 2
openstax_society 1047.37 163 100% 107 2
wpa_life_histories 34.09 2448 100% 2448 1

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.