hybridize vs mongrelize

hybridize

verb
  • To cross-breed animals or plants to form hybrids. 

  • To combine complementary subunits of multiple biological macromolecules. 

  • To form a mixture of any kind. 

  • To construct a hybrid word from elements of different languages. 

  • To combine atomic orbitals mathematically to form hybrid orbitals. 

  • To produce hybrid offspring; to interbreed. 

mongrelize

verb
  • To cross-breed 

  • To breed a mongrel 

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