chimpanzee vs macaque

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. 

macaque

noun
  • Any of a group of Old World monkeys of the subfamily Cercopithecinae, especially genus Macaca. 

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