peril vs rescue

peril

verb
  • To cause to be in danger; to imperil; to risk. 

noun
  • A situation of serious and immediate danger. 

  • An event which causes a loss, or the risk of a specific such event. 

  • Something that causes, contains, or presents danger. 

rescue

verb
  • To save from any violence, danger or evil. 

  • To recover forcibly. 

  • To achieve something positive under difficult conditions. 

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

  • 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 peril and rescue occurred in a corpus of books? (source: Google Ngram Viewer )