expel vs supersede

expel

verb
  • To deport. 

  • To eject or erupt. 

  • To remove from membership. 

supersede

verb
  • To displace in favour of itself. 

  • To take the place of. 

noun
  • An updated newsgroup post that supersedes an earlier version. 

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