clawback vs ruler

clawback

noun
  • A rule that permits a party to take back evidentiary materials that were mistakenly turned over to the other party but to which the other party would not have been entitled. 

  • Any recovery of a performance-related payment based on discovery that the performance was not genuine. 

  • Money that a party is entitled to keep under one tax provision but is taken by another tax provision. 

ruler

noun
  • A person who rules or governs; someone or something that exercises dominion or controlling power over others. 

  • A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a straightedge with markings. 

verb
  • To beat with a ruler (as a traditional school punishment). 

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