engender vs foster

engender

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

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

  • 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. 

foster

verb
  • To cultivate and grow something. 

  • To nurture or bring up offspring, or to provide similar parental care to an unrelated child. 

  • To nurse or cherish something. 

noun
  • A foster parent. 

  • The care given to another; guardianship. 

adj
  • Related by such care. 

  • Receiving such care. 

  • Providing parental care to children not related to oneself. 

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