impertinent vs smart-arsed

impertinent

adj

  • insolent, ill-mannered. 

  • irrelevant, useless. 

noun

  • An impertinent individual. 

smart-arsed

adj

  • having the irritating qualities of a smart arse, with a know-it-all attitude. 

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