Aboriginal vs Amerindian

Aboriginal

noun

  • An Aboriginal inhabitant of Australia. 

adj

  • Of or pertaining to Australian Aboriginal peoples, Aborigines, or their language. 

name

  • Any of the native languages spoken by Australian aborigines. 

Amerindian

noun

  • An American Indian. 

adj

  • American Indian. 

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