engender vs restrain

engender

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

  • 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. 

restrain

verb
  • To restrict or limit. 

  • To control or keep in check. 

  • To deprive of liberty. 

  • To strain again. 

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