Base Difficulty

Base difficulty: Level 162 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
basic_english Extended (2 of 2) 1600
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 141.25 651 97% 671 downrated 1
20th_books 72.40 1229 97% 1266 downrated 1
wiki_math 740.86 178 97% 183 downrated 1
wiki_geography 178.76 672 97% 692 downrated 1
wiki_biology 513.61 195 97% 201 downrated 1
wiki_modern_life 330.60 307 97% 316 downrated 1
wiki_arts 198.16 594 97% 612 downrated 1
wiki_society 45.80 2839 97% 2924 downrated 1
wiki_linguistics 201.67 610 97% 628 downrated 1
wiki_physical_science 352.00 366 97% 377 downrated 1
wiki_history 53.33 2322 97% 2392 downrated 1
early_modern_science 311.73 338 97% 348 downrated 1
religious_translated 103.24 962 97% 991 downrated 1
cooking 86.90 1234 97% 1271 downrated 1
legal_scotus 51.54 2158 97% 2223 downrated 1
eu_parliament_debates 31.88 2671 97% 2751 downrated 1
openstax_science 309.70 395 97% 407 downrated 1
openstax_society 42.81 2878 97% 2964 downrated 1
wpa_life_histories 35.52 2317 97% 2387 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.