guinea vs guinea fowl

guinea

noun
  • Synonym of guinea fowl 

  • A person of Italian descent. 

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

guinea fowl

noun
  • Any of several African birds of the family Numididae (6 species) resembling partridges. 

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