Italian vs dago

Italian

noun
  • An inhabitant of Italy, or a person of Italian descent. 

  • The official language of Italy, also spoken in San Marino, the Vatican, and parts of Argentina, Slovenia and Switzerland. 

  • Italian vermouth, a dark-colored, sweet or mildly bitter vermouth. 

  • A style of cuisine or individual dishes of or associated with Italy or Italian people. 

  • A type of linen or cotton cloth with satin finish used primarily for linings, Italian cloth. 

  • An Italian sandwich. 

adj
  • Pertaining to Italy, its people or its language. 

dago

noun
  • A person of Italian, Spanish, Portuguese, Greek, or other Mediterranean descent. 

  • A person of Italian descent. 

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