grey vs mixed-race

grey

adj

  • Synonym of coloured (pertaining to the mixed race of black and white). 

  • UK and Commonwealth standard spelling of gray. 

noun

  • UK and Commonwealth standard spelling of gray. 

verb

  • UK and Commonwealth standard spelling of gray. 

mixed-race

adj

  • Having genetic characteristics of two or more different races. 

How often have the words grey and mixed-race occurred in a corpus of books? (source: Google Ngram Viewer )