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: 567 (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 76.47 1210 100% 1210 1
20th_books 55.94 1630 100% 1630 1
wiki_math 208.45 806 100% 604 2
wiki_geography 424.30 375 100% 290 2
wiki_biology 353.84 546 100% 373 2
wiki_modern_life 383.50 451 100% 328 2
wiki_arts 54.99 2527 100% 2527 1
wiki_society 398.82 539 100% 316 2
wiki_linguistics 71.01 2665 100% 1548 2
wiki_physical_science 637.90 249 100% 199 2
wiki_history 85.65 2534 100% 1568 2
early_modern_science 152.56 731 100% 731 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 245.22 835 100% 534 2
eu_parliament_debates 198.24 967 100% 591 2
openstax_science 689.04 187 100% 160 2
openstax_society 797.09 293 100% 148 2
wpa_life_histories 58.34 1875 100% 1419 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.