enact vs throw over

enact

verb
  • to do; to effect 

  • to act the part of; to play 

  • to make (a bill) into law 

throw over

verb
  • To discard or give up (a plan or project, etc.). 

  • To end a romantic/sexual relationship with. 

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