a posteriori vs empirical

a posteriori

adj
  • Involving induction of theories from facts. 

  • Developed on a basis of languages which already exist. 

adv
  • In a manner that deduces theories from facts. 

empirical

adj
  • Pertaining to or based on experience (often, in contrast with having a basis in theoretical explanation). 

  • Pertaining to, derived from, or testable by observations made using the physical senses or using instruments which extend the senses. 

  • Verifiable by means of scientific experimentation. 

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