surety vs suspicion

surety

noun
  • Evidence; confirmation; warrant. 

  • A promise to pay a sum of money in the event that another person fails to fulfill an obligation. 

  • One who undertakes to pay money or perform other acts in the event that his principal fails therein. 

  • A substitute; a hostage. 

  • Certainty. 

  • That which makes sure; that which confirms; ground of confidence or security. 

suspicion

noun
  • A trace, or slight indication. 

  • Uncertainty, doubt. 

  • The imagining of something without evidence. 

  • The act of suspecting something or someone, especially of something wrong. 

  • The condition of being suspected. 

verb
  • To suspect; to have suspicions. 

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