cultivate vs deplete

cultivate

verb
  • To turn or stir soil in preparation for planting. 

  • To nurture; to foster; to tend. 

  • To grow plants, notably crops. 

deplete

verb
  • To empty or unload, as the vessels of the human system, by bloodletting or by medicine. 

  • To reduce by destroying or consuming the vital powers of; to exhaust, as a country of its strength or resources, a treasury of money, etc. 

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