interbreed vs jumble

interbreed

verb
  • To breed or reproduce within an isolated community. 

  • To breed or reproduce within a heterogenous community, the products of which produce hybrids. 

jumble

verb
  • To meet or unite in a confused way. 

  • To mix or confuse. 

noun
  • A mixture of often unrelated things. 

  • A rummage sale. 

  • Items for a rummage sale. 

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