danger vs threat

danger

noun
  • The stop indication of a signal (usually in the phrase "at danger"). 

  • An instance or cause of likely harm. 

  • Exposure to likely harm; peril. 

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 danger and threat occurred in a corpus of books? (source: Google Ngram Viewer )