contract killing vs reckoning

contract killing

noun
  • The act of hiring or procuring a contract killer. 

reckoning

noun
  • The working out of consequences or retribution for one's actions. 

  • An opinion or judgement. 

  • The action of calculating or estimating something. 

  • A summing up or appraisal. 

  • The settlement of accounts, as between parties. 

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