bison vs foo dog

bison

noun
  • A large, wild bovid of the genus Bison. 

foo dog

noun
  • A Pekingese dog. 

  • A stylized lion statue similar to those usually placed in male and female pairs outside imperial Chinese palaces, tombs, temples, etc. 

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