Bushman vs indigene

Bushman

noun
  • A member of one of the foraging ethnic groups native to southwestern Africa, mostly the Kalahari. 

  • A person who lives in the bush, especially a member of a community or ethnic group who lives in the bush. 

indigene

noun
  • An indigenous person; a native. 

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