Base Difficulty

Base difficulty: Level 460 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: 2316 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B2 (4 of 6) 6900

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 25.85 2041 50% 3192 downrated 2
20th_books 10.10 3799 50% 7598 downrated 1
wiki_math 19.63 2402 50% 4804 downrated 1
wiki_geography 115.45 757 50% 1151 downrated 2
wiki_biology 71.08 1280 50% 1913 downrated 2
wiki_modern_life 41.44 1779 50% 3558 downrated 1
wiki_arts 25.77 2689 50% 5378 downrated 1
wiki_society 29.71 2343 50% 4686 downrated 1
wiki_linguistics 31.17 2950 50% 3380 downrated 2
wiki_physical_science 61.75 1627 50% 2254 downrated 2
wiki_history 25.43 2685 50% 5370 downrated 1
early_modern_science 157.19 472 50% 702 downrated 2
religious_translated 84.88 841 50% 1211 downrated 2
cooking 296.36 341 50% 498 downrated 2
legal_scotus 77.41 1155 50% 1620 downrated 2
eu_parliament_debates 0.00 — — — 0
openstax_science 91.02 986 50% 1511 downrated 2
openstax_society 53.53 1716 50% 2445 downrated 2
wpa_life_histories 8.07 4614 50% 9228 downrated 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.