election vs plebiscite

election

noun
  • The choice of a leader or representative by popular vote. 

  • In Calvinism, God's predestination of saints including all of the elect. 

  • A process of choosing a leader, members of parliament, councillors, or other representatives by popular vote. 

  • An option that is selected. 

plebiscite

noun
  • A referendum, especially one that concerns changes in sovereignty 

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