Native vs sachem

Native

noun
  • A Native American. 

  • An Aborigine. 

  • An aboriginal inhabitant of a colonized region, especially one colonized by English-speaking people. (Compare native, which is more general.) 

adj
  • Aboriginal; of or relating to Australian Aboriginal peoples, Aborigines. 

  • Aboriginal to a colonized region, especially one colonized by English-speaking people. (Compare native, which is more general.) 

  • Related to black Africans, especially Bantu. 

  • Indian: Native American or First Nation; of or relating to (North) American Indians. 

sachem

noun
  • A chief of one or several Native American tribe(s), especially of the Algonquians; a sagamore. 

  • A boss, a leader. 

  • A high-ranking officer of the Tammany Hall political organization. 

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