cultivate vs impede

cultivate

verb
  • To nurture; to foster; to tend. 

  • To turn or stir soil in preparation for planting. 

  • To grow plants, notably crops. 

impede

verb
  • To get in the way of; to hinder. 

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