engender vs occasion

engender

verb
  • To assume form; to come into existence; to be caused or produced. 

  • To give existence to, to produce (living creatures). 

  • To bring into existence (a situation, quality, result etc.); to give rise to, cause, create. 

  • To endow with gender; to create gender or enhance the importance of gender. 

occasion

verb
  • To cause; to produce; to induce 

noun
  • 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. 

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

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

  • A favorable opportunity; a convenient or timely chance. 

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