crossbreed vs join

crossbreed

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

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

  • 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. 

join

verb
  • To connect or combine into one; to put together. 

  • To unite in marriage. 

  • To produce an intersection of data in two or more database tables. 

  • To come into the company of. 

  • To come together; to meet. 

  • To accept, or engage in, as a contest. 

  • To become a member of. 

  • To enter into association or alliance, to unite in a common purpose. 

noun
  • An intersection of data in two or more database tables. 

  • The act of joining something, such as a network. 

  • The lowest upper bound, an operation between pairs of elements in a lattice, denoted by the symbol ∨. 

  • An intersection of piping or wiring; an interconnect. 

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