goombah vs greaseball

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. 

greaseball

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

  • A biker, a tough. 

  • A rocker or metalhead, especially one who listens to 1950s rock and roll or 1980s thrash metal. 

  • A mechanic. 

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