armament vs surety

armament

noun
  • A body of forces equipped for war. 

  • The process of building up military capacity. 

  • Any equipment for resistance. 

  • All the cannon and small arms collectively, with their equipments, belonging to a ship or a fortification. 

surety

noun
  • 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. 

  • Evidence; confirmation; warrant. 

  • Certainty. 

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

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