ouster vs relegation

ouster

noun
  • Someone who ousts. 

  • Action by a cotenant that prevents another cotenant from enjoying the use of jointly owned property. 

  • A putting out of possession; dispossession; ejection. 

  • Specifically, the forceful removal of a politician or regime from power; coup. 

verb
  • To oust. 

relegation

noun
  • The act of being relegated 

  • Moving from one division to a lower one, due to poor results 

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