exclusion vs relegation

exclusion

noun
  • The act of excluding or shutting out; removal from consideration or taking part. 

  • An item not covered by an insurance policy. 

relegation

noun
  • The act of being relegated 

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

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