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: 1129 (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 13.50 4476 80% 5595 downrated 1
20th_books 10.94 5053 80% 6316 downrated 1
wiki_math 16.58 3540 80% 4425 downrated 1
wiki_geography 284.73 329 80% 411 downrated 1
wiki_biology 150.99 717 80% 896 downrated 1
wiki_modern_life 98.16 1183 80% 1479 downrated 1
wiki_arts 66.51 1657 80% 2071 downrated 1
wiki_society 179.08 548 80% 685 downrated 1
wiki_linguistics 164.43 647 80% 809 downrated 1
wiki_physical_science 83.95 1393 80% 1741 downrated 1
wiki_history 110.92 954 80% 1192 downrated 1
early_modern_science 35.83 2461 80% 3076 downrated 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 673.98 156 80% 160 downrated 2
eu_parliament_debates 201.74 487 80% 609 downrated 1
openstax_science 57.81 1882 80% 2352 downrated 1
openstax_society 235.91 435 80% 544 downrated 1
wpa_life_histories 21.23 2917 80% 3646 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.