engender vs keep it in one's pants

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. 

keep it in one's pants

verb
  • To refrain from trying to have sex with someone. 

How often have the words engender and keep it in one's pants occurred in a corpus of books? (source: Google Ngram Viewer )