multiracial vs skewbald

multiracial

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

noun
  • An individual of more than one race. 

skewbald

adj
  • Marked with patches of white and non-black colours. 

noun
  • A skewbald horse. 

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