Base Difficulty

Base difficulty: Level 276 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: 5192 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 15.77 1973 20% 5642 downrated 2
20th_books 21.15 1212 20% 4372 downrated 2
wiki_math 5.30 3029 20% 8000 capped 1
wiki_geography 0.00 — — — 0
wiki_biology 50.75 672 20% 2628 downrated 2
wiki_modern_life 51.40 552 20% 2441 downrated 2
wiki_arts 31.03 849 20% 4245 downrated 1
wiki_society 38.95 760 20% 3341 downrated 2
wiki_linguistics 21.78 1193 20% 5965 downrated 1
wiki_physical_science 37.03 781 20% 3905 downrated 1
wiki_history 9.23 2953 20% 9000 capped 1
early_modern_science 12.59 3020 17% 8276 downrated 2
religious_translated 18.55 1605 20% 5312 downrated 2
cooking 12.39 1386 17% 5200 capped 1
legal_scotus 37.06 776 20% 3402 downrated 2
eu_parliament_debates 32.07 808 20% 3486 downrated 2
openstax_science 25.27 1619 20% 5316 downrated 2
openstax_society 12.64 2156 20% 10780 downrated 1
wpa_life_histories 4.64 4145 20% 13988 downrated 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.