deer vs hart

deer

noun
  • One of the smaller animals of this family, distinguished from a moose or elk 

  • The meat of such an animal; venison. 

  • A ruminant mammal with antlers and hooves of the family Cervidae, or one of several similar animals from related families of the order Artiodactyla. 

hart

noun
  • A male red deer or one of related species. 

  • A male deer, especially the male of the red deer after his fifth year. 

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