housebreak vs toilet-train

housebreak

verb
  • To train an animal to avoid urinating or defecating in the house, except within a litterbox, toilet, or other receptacle. 

  • To break into a house, typically to burgle it. 

toilet-train

verb
  • To train (a domestic animal) to defecate and urinate in certain designated places. 

  • To train (a child) to use the toilet. 

How often have the words housebreak and toilet-train occurred in a corpus of books? (source: Google Ngram Viewer )