excommunicate vs expel

excommunicate

verb
  • To exclude from any other group; to banish. 

  • To officially exclude someone from membership of a church or religious community. 

noun
  • An excommunicated person. 

adj
  • Excommunicated. 

expel

verb
  • To remove from membership. 

  • To eject or erupt. 

  • To deport. 

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