mixed vs unrepeatable

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. 

unrepeatable

adj
  • (of an experiment or procedure) That gives different results when repeated 

  • Unable to be repeated 

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