engender vs stir up

engender

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

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

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

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

stir up

verb
  • To arouse or excite (passion or action). 

  • To move or disturb slightly; to make turbid. 

  • To mix (ingredients) by stirring. 

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