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: 614 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr B2 (4 of 6) 6900

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 75.86 1282 77% 1181 2
20th_books 53.87 1624 77% 1598 2
wiki_math 79.73 1207 77% 1569 downrated 1
wiki_geography 117.48 1112 77% 1152 downrated 2
wiki_biology 130.03 805 77% 1046 downrated 1
wiki_modern_life 205.88 440 77% 572 downrated 1
wiki_arts 101.21 1022 77% 1329 downrated 1
wiki_society 118.63 861 77% 1119 downrated 1
wiki_linguistics 43.94 2178 77% 2831 downrated 1
wiki_physical_science 1557.99 51 77% 60 downrated 2
wiki_history 92.32 1093 77% 1421 downrated 1
early_modern_science 311.78 379 77% 351 2
religious_translated 20.83 3198 77% 4157 downrated 1
cooking 47.66 1559 77% 2027 downrated 1
legal_scotus 17.90 4116 77% 5351 downrated 1
eu_parliament_debates 41.74 1943 77% 2526 downrated 1
openstax_science 934.51 86 77% 101 downrated 2
openstax_society 86.73 1245 77% 1618 downrated 1
wpa_life_histories 20.41 2918 77% 3793 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.