belletristic vs bookish

belletristic

adj
  • Written or appreciated for aesthetic value rather than content 

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

bookish

adj
  • Fond of reading or studying, especially said of someone lacking social skills as a result. 

  • Characterized by a method of expression generally found in books. 

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