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: 580 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 34.68 2514 100% 2514 1
20th_books 44.59 1950 100% 1950 1
wiki_math 201.54 847 100% 619 2
wiki_geography 162.33 1188 100% 848 2
wiki_biology 358.13 655 100% 376 2
wiki_modern_life 422.20 363 100% 284 2
wiki_arts 68.08 2029 100% 2029 1
wiki_society 220.86 727 100% 595 2
wiki_linguistics 89.69 1847 100% 1300 2
wiki_physical_science 685.37 287 100% 192 2
wiki_history 73.27 1870 100% 1870 1
early_modern_science 269.45 449 100% 400 2
religious_translated 42.54 3600 100% 1932 2
cooking 322.19 498 100% 417 2
legal_scotus 394.94 389 100% 315 2
eu_parliament_debates 219.37 773 100% 529 2
openstax_science 753.42 190 100% 149 2
openstax_society 331.23 491 100% 399 2
wpa_life_histories 140.24 763 100% 704 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.