Base Difficulty

Base difficulty: Level 162 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: 265 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr A1 (1 of 6) 800

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 241.18 408 79% 417 downrated 2
20th_books 194.02 518 79% 525 downrated 2
wiki_math 2757.59 52 79% 40 2
wiki_geography 397.71 281 79% 290 downrated 2
wiki_biology 173.26 824 79% 787 2
wiki_modern_life 607.68 191 79% 166 2
wiki_arts 319.02 401 79% 376 2
wiki_society 268.84 523 79% 473 2
wiki_linguistics 273.90 540 79% 482 2
wiki_physical_science 881.13 111 79% 118 downrated 2
wiki_history 292.77 440 79% 409 2
early_modern_science 561.01 209 79% 185 2
religious_translated 146.29 875 79% 710 2
cooking 427.47 350 79% 346 2
legal_scotus 504.13 246 79% 235 2
eu_parliament_debates 894.34 147 79% 134 2
openstax_science 696.39 152 79% 154 downrated 2
openstax_society 430.63 271 79% 281 downrated 2
wpa_life_histories 147.03 800 79% 671 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.