reign vs tenure

reign

noun
  • The territory or sphere over which a kingdom; empire; realm; dominion, etc. is ruled. 

  • The exercise of sovereign power. 

  • The period during which a monarch rules. 

verb
  • To exercise sovereign power, to rule as a monarch. 

  • To reign over (a country) 

  • To be a dominant quality of a place or situation; to prevail, predominate, rule. 

  • To be the winner of the most recent iteration of a competition. 

tenure

noun
  • A right to hold land under the feudal system. 

  • A status of possessing a thing or an office; an incumbency. 

  • A period of time during which something is possessed. 

  • A status of having a permanent post with enhanced job security within an academic institution. 

verb
  • To grant tenure, the status of having a permanent academic position, to (someone). 

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