scare off vs unhinge

scare off

verb
  • To cause (something) to flee by frightening it. 

  • To deter 

unhinge

verb
  • To mentally disturb. 

  • To remove the leaf of a door or a window from its supporting hinges. 

  • To dislocate. 

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