a priori vs visionary

a priori

adj
  • Presumed without analysis. 

  • Self-evident, intuitively obvious. 

  • Based on hypothesis and theory rather than experiment or empirical evidence. 

  • Developed entirely from scratch, without deriving it from existing languages. 

adv
  • In a way based on theoretical deduction rather than empirical observation. 

visionary

adj
  • imaginary or illusory 

  • having vision or foresight 

  • idealistic or utopian 

  • prophetic or revelatory 

noun
  • Someone who has positive ideas about the future. 

  • An impractical dreamer. 

  • Someone who has visions; a seer. 

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