cultivate vs nurture

cultivate

verb
  • To grow plants, notably crops. 

  • To turn or stir soil in preparation for planting. 

  • To nurture; to foster; to tend. 

nurture

verb
  • To encourage, especially the growth or development of something. 

  • To nourish or nurse. 

noun
  • That which nourishes; food; diet. 

  • The act of nourishing or nursing; tender care 

  • The environmental influences that contribute to the development of an individual (as opposed to "nature"). 

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