Base Difficulty

Base difficulty: Level 276 edit

Level distribution for noun (quantitative_concept): 20: 1 162: 24 276: 25 380: 25 390: 1 456: 1 1000: 1 1050: 2 1070: 2 1080: 10 1090: 1 1110: 1 1202: 2 1203: 1 1204: 2 1206: 1 1210: 2 1211: 1 1213: 7 1218: 1 1225: 2 1226: 1

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-1299 for level
Frequency and Tier Signals
Combined Frequency Rank: — (run python -m storage.admin --calc-ranks to populate)
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 17.87 1900 20% 4831 downrated 2
20th_books 23.29 1165 20% 3783 downrated 2
wiki_math 5.35 2936 20% 8000 capped 1
wiki_geography 5.50 4013 20% 9000 capped 1
wiki_biology 53.66 644 20% 2430 downrated 2
wiki_modern_life 53.20 536 20% 2319 downrated 2
wiki_arts 36.40 793 20% 3419 downrated 2
wiki_society 40.87 694 20% 2989 downrated 2
wiki_linguistics 22.34 1096 20% 5480 downrated 1
wiki_physical_science 37.21 773 20% 3865 downrated 1
wiki_history 9.73 2617 20% 9000 capped 1
early_modern_science 14.81 2625 20% 6846 downrated 2
religious_translated 20.36 1563 20% 4738 downrated 2
cooking 17.00 1278 20% 5200 capped 1
legal_scotus 38.60 751 20% 3202 downrated 2
eu_parliament_debates 32.78 808 20% 3354 downrated 2
openstax_science 26.88 1618 20% 4973 downrated 2
openstax_society 12.61 2165 20% 10825 downrated 1
wpa_life_histories 4.89 4142 20% 13129 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.