mixed vs piled

mixed

adj
  • Having two or more separate aspects. 

  • Including both male(s) and female(s). 

  • Not completely pure, tainted or adulterated. 

  • Stemming from two or more races or breeds 

piled

adj
  • Having a pile or point; pointed. 

  • Formed from a pile or fagot. 

  • Having a pile or nap. 

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