unself-confident vs wise guy

unself-confident

wise guy

noun
  • A hipster. 

  • A member of the Mafia; a mobster. 

  • A knowledgable or successful sports bettor. 

  • One who is insolent or flippant; one who makes jokes or perpetrates pranks. 

  • An Italian-American man. 

How often have the words unself-confident and wise guy occurred in a corpus of books? (source: Google Ngram Viewer )