multiracial vs polychromatic

multiracial

adj
  • Composed of, or having a mixture of, multiple races. 

noun
  • An individual of more than one race. 

polychromatic

adj
  • Showing a variety, or a change, of colours; having many colours; multicoloured. 

  • Composed of more than one wavelength. 

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