occasion vs occurrent

occasion

noun
  • A particular happening; an instance or time when something occurred. 

  • Need; requirement, necessity. 

  • The time when something happens. 

  • Something which causes something else; a cause. 

  • A reason or excuse; a motive; a persuasion. 

  • A special event or function. 

  • An occurrence or state of affairs which causes some event or reaction; a motive or reason. 

  • A favorable opportunity; a convenient or timely chance. 

verb
  • To cause; to produce; to induce 

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