episode vs occurrent

episode

noun
  • An incident, action, or time period standing out by itself, but more or less connected with a complete series of events. 

  • An instalment of a drama told in parts, as in a TV series. 

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 episode and occurrent occurred in a corpus of books? (source: Google Ngram Viewer )