depart vs migrate

depart

verb
  • To set out on a journey. 

  • To leave. 

  • To die. 

  • To disappear, vanish; to cease to exist. 

  • To go away from; to leave. 

  • To deviate (from), be different (from), fail to conform. 

migrate

verb
  • To move slowly towards, usually in groups. 

  • To change one's geographic pattern of habitation. 

  • To relocate periodically from one region to another, usually according to the seasons. 

  • To move computer code or files from one computer or network to another. 

  • To induce customers to shift purchases from one set of a company's related products to another. 

  • To change habitations across a border; to move from one country or political region to another. 

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