Aboriginal vs precolonial

Aboriginal

noun
  • An Aboriginal inhabitant of Australia. 

name
  • Any of the native languages spoken by Australian aborigines. 

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

precolonial

noun
  • An inhabitant of an area before colonists first arrived. 

adj
  • Of or pertaining to a historical period before colonisation. 

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