chimpanzee vs spider monkey

chimpanzee

noun
  • A member of the genus Pan, including the bonobo which is also known as the pygmy chimpanzee. 

  • Pan troglodytes, a species of great ape in the genus Pan, native to Africa, and believed by biologists to be the closest extant relative to humans along with the bonobo. 

spider monkey

noun
  • Any New World monkey of the genus Ateles, with long, spindly limbs. 

  • A muriqui, New World monkey of the genus Brachyteles, closely related to Ateles. 

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