Aboriginal vs enchorial

Aboriginal

adj

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

noun

  • An Aboriginal inhabitant of Australia. 

name

  • Any of the native languages spoken by Australian aborigines. 

enchorial

adj

  • Indigenous, native. 

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