caretaker vs couch doctor

caretaker

noun
  • Someone who takes care of a person; a parent, carer or other guardian. 

  • Someone who takes care of a place or thing; someone looking after a place, or responsible for keeping it in good repair. 

adj
  • Temporary, on a short term basis. 

couch doctor

noun
  • A psychiatrist. 

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