guido vs guinea

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. 

guinea

noun
  • A person of Italian descent. 

  • Synonym of guinea fowl 

  • A gold coin originally worth twenty shillings; later (from 1717 until the adoption of decimal currency) standardised at a value of twenty-one shillings. 

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