frighten vs unhinge

frighten

verb
  • To cause to feel fear; to scare; to cause to feel alarm or fright. 

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 frighten and unhinge occurred in a corpus of books? (source: Google Ngram Viewer )