peril vs threat

peril

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. 

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

threat

noun
  • An indication of potential or imminent danger. 

  • A person or object that is regarded as a danger; a menace. 

  • An expression of intent to injure or punish another. 

verb
  • To press; urge; compel. 

  • To use threats; act or speak menacingly; threaten. 

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