biped vs hominine

biped

noun
  • An animal, being or construction that goes about on two feet (or two legs). 

hominine

adj
  • Of or relating to the Homininae, a subfamily of Hominidae that includes humans, gorillas, chimpanzees, and some extinct relatives. 

noun
  • Any member of the subfamily Homininae 

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