put down vs rescue

put down

verb
  • To drop someone off, or let them out of a vehicle. 

  • To euthanize (an animal). 

  • To make prices, or taxes, lower. 

  • To pay. 

  • To terminate a call; to hang up. 

  • To give something as a reason for something else. 

  • To add a name to a list. 

  • To insult, belittle, or demean. 

  • To halt, eliminate, stop, or squelch, often by force. 

  • To land. 

  • Used other than figuratively or idiomatically: see put, down. 

  • To execute (a person), especially extrajudicially. 

  • To write (something). 

  • To place a baby somewhere to sleep. 

  • To cease, temporarily or permanently, reading (a book). 

rescue

verb
  • To free or liberate from confinement or other physical restraint. 

  • To recover forcibly. 

  • To achieve something positive under difficult conditions. 

  • To save from any violence, danger or evil. 

  • To deliver by arms, notably from a siege. 

  • To remove or withdraw from a state of exposure to evil and sin. 

noun
  • A rescuee. 

  • A liberation, freeing. 

  • An act or episode of rescuing, saving. 

  • The forcible ending of a siege; liberation from similar military peril 

  • A special airliner flight to bring home passengers who are stranded 

How often have the words put down and rescue occurred in a corpus of books? (source: Google Ngram Viewer )