reassurance vs threat

reassurance

noun
  • The act of confirming someone's opinion or impression. 

  • Reinsurance. 

  • The feeling of being reassured, of having confidence restored, of having apprehensions dispelled. 

threat

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

  • An indication of potential or imminent danger. 

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