dago vs guido

dago

noun
  • A person of Italian descent. 

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

guido

noun
  • a stereotypical working-class or lower-class and usually urban-dwelling Italian-American male; sometimes more generally a stereotypical Italian or person of Italian descent 

  • A guidance officer. 

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