impertinent vs unfun

impertinent

adj

  • irrelevant, useless. 

  • insolent, ill-mannered. 

noun

  • An impertinent individual. 

unfun

adj

  • Not fun. 

noun

  • Lack or absence of fun; funlessness. 

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