Roman vs belletristic

Roman

adj
  • Supporting the characters of the Latin alphabet. 

  • Of or pertaining to the Roman Catholic Church or the Holy See. 

  • A font that is upright, as opposed to oblique or italic. (See roman font.) 

  • Of or from the Roman Empire. 

  • Used to distinguish a Roman numeral from an Arabic numeral in oral discourse. 

  • Of noble countenance but with little facial expression. 

  • Of a style characterised by the size and boldness of its round arches and vaults, and having baths, aqueducts, basilicas, amphitheatres, etc. 

  • Of or from Rome. 

noun
  • A native or resident of Rome. 

  • A single letter or character in Roman type. 

  • The Roman script. 

  • A native or resident of the Roman Empire. 

name
  • A surname. 

  • A male given name from Latin recently borrowed from continental Europe. 

belletristic

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

  • Written or appreciated for aesthetic value rather than content 

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