belletristic vs knowledgeable

belletristic

adj
  • Of, pertaining to, or having the characteristics of belles-lettres. 

  • Written or appreciated for aesthetic value rather than content 

knowledgeable

adj
  • Having knowledge, especially of a particular subject. 

  • Educated and well informed. 

noun
  • A person who has knowledge; an informed party. 

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