chimpanzee vs great ape

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. 

great ape

noun
  • Any member of the taxonomic family Hominidae, including gorilla, orangutan, chimpanzee, excluding Homo. 

  • Any member of the taxonomic family Hominidae, including Homo, and also many similar extinct species. 

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