Native American vs North American Indian

Native American

noun
  • A member of some Indigenous peoples of the Americas. 

  • An Indigenous person of the Continental United States (excluding Hawaii and the other Pacific territories, since those aren't a part of the Americas). 

adj
  • Of the American Indians. 

North American Indian

noun
  • A member of one of the indigenous peoples of North America (but not a member of the Aleut, Inuit, Metis, or Yupik). 

adj
  • Of or relating to the indigenous peoples of the Americas (but not the Aleut, Inuit, Metis, or Yupik). 

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