crossbreed vs intercross

crossbreed

verb
  • To mate so as to produce a hybrid; interbreed. 

  • To mate (an organism) with another organism so as to produce a hybrid. 

  • To produce (an organism) by the mating of individuals of different breeds, varieties, or species; hybridize. 

noun
  • An organism produced by mating of individuals of different varieties or breeds. 

intercross

verb
  • To breed two strains having a common ancestry with one another 

  • To cross back over one another 

noun
  • The act or product of intercrossing 

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