demonstration vs occurrent

demonstration

noun
  • An event at which something will be demonstrated. 

  • A public display of group opinion, such as a protest march. 

  • A proof. 

  • Expression of one's feelings by outward signs. 

  • The act of demonstrating; showing or explaining something. 

  • A prisoner's act of beating up another prisoner. 

  • A show of military force. 

occurrent

noun
  • An event, something that occurs. 

  • One who comes to meet another. 

adj
  • Pertaining to occurrence; having to do with an occurrence. 

  • Current, actual, occurring. 

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