co-ed vs mixed

co-ed

adj
  • Of any location, that mixes males and females. 

  • Of an educational institution, that teaches both males and females. 

mixed

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

  • Not completely pure, tainted or adulterated. 

  • Stemming from two or more races or breeds 

  • Having two or more separate aspects. 

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