certain vs fuzzy

certain

adj
  • Unfailing; infallible. 

  • Known but not specifically named; indeterminate; indefinite; one or some; sometimes used independently as a noun, and meaning certain persons; see also "one". 

  • Fixed or stated; regular; determinate. 

  • Not to be doubted or denied; established as a fact. 

  • Sure, positive, not doubting. 

  • Actually existing; sure to happen; inevitable. 

det
  • Having been determined but not specified. 

pron
  • Unnamed or undescribed members (of). 

fuzzy

adj
  • Not clear; unfocused. 

  • Vague or imprecise. 

  • Covered with fuzz or a large number of tiny loose fibres like a carpet or many stuffed animals 

  • Employing or relating to fuzzy logic. 

noun
  • A person, especially a college student, interested in humanities or social sciences, as opposed to one interested in mathematics, science, or engineering. 

  • A very small piece of plush material. 

  • Something covered with fuzz or hair, as an animal or plush toy. 

  • A soldier with the rank of private. 

How often have the words certain and fuzzy occurred in a corpus of books? (source: Google Ngram Viewer )