endemic vs indigen

endemic

noun
  • An individual or species that is endemic to a region. 

  • A disease affecting a number of people simultaneously, so as to show a distinct connection with certain localities. 

adj
  • Native to a particular area or culture; originating where it occurs. 

  • Peculiar to a particular area or region; not found in other places. 

  • Prevalent in a particular area or region. 

indigen

noun
  • A plant known to be indigenous to a region, rather than a cultigen. 

  • An indigene or native. 

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