undistinguished vs unfun

undistinguished

adj
  • Not distinguished: not having an air of distinction. 

  • Not distinguished: not marked by conspicuous qualities. 

unfun

adj
  • Not fun. 

noun
  • Lack or absence of fun; funlessness. 

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