bounty vs rareness

bounty

verb
  • To offer a monetary reward for the capturing or killing of. 

noun
  • Generosity; also (countable) an act of generosity. 

  • A reward for some specific act, especially one given by an authority or a government. 

  • A monetary reward for capturing (or, in the past, killing) a person accused or convicted of a crime and who is at large; also, a similar reward for capturing or killing an animal which is dangerous or causing a nuisance. 

  • An abundance or wealth. 

  • Money paid to a person when becoming a member of the armed forces, or as a reward for some service therein. 

  • Something given liberally; a gift. 

rareness

noun
  • The property of being rare; rarity 

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