goombah vs pizza nigger

goombah

noun
  • A person of Italian descent (often implies the person is connected to Italian organized crime) 

  • A companion, pal, close friend, or associate, especially among Italian-American men. It sometimes has the connotation of an older friend who acts as a patron, protector or adviser. 

pizza nigger

noun
  • A person of Italian descent. 

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