a priori vs authoritative

a priori

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

  • Presumed without analysis. 

  • Self-evident, intuitively obvious. 

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

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

authoritative

adj
  • Highly accurate or definitive; treated or worthy of treatment as a scholarly authority 

  • Having a commanding style. 

  • Arising or originating from a figure of authority 

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