of color vs stained

of color

adj
  • Nonwhite; of a race other than white, for example black. 

  • Belonging to a category of people with mixed black and white ancestry in the Americas in the 18th and early 19th centuries. 

stained

adj
  • coloured by adding a pigment 

  • having a stain 

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