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: 4039 (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 3.38 4476 20% 20000 capped 1
20th_books 2.73 5053 20% 20000 capped 1
wiki_math 4.15 3540 20% 8000 capped 1
wiki_geography 71.18 329 20% 1645 downrated 1
wiki_biology 37.75 717 20% 3585 downrated 1
wiki_modern_life 24.54 1183 20% 5915 downrated 1
wiki_arts 16.63 1657 20% 8285 downrated 1
wiki_society 44.77 548 20% 2740 downrated 1
wiki_linguistics 41.11 647 20% 3235 downrated 1
wiki_physical_science 20.99 1393 20% 6965 downrated 1
wiki_history 27.73 954 20% 4770 downrated 1
early_modern_science 8.96 2461 20% 10400 capped 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 168.50 156 20% 639 downrated 2
eu_parliament_debates 50.43 487 20% 2435 downrated 1
openstax_science 14.45 1882 20% 9410 downrated 1
openstax_society 58.98 435 20% 2175 downrated 1
wpa_life_histories 5.31 2917 20% 14585 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.