migrate vs transmigrate

migrate

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

  • To change one's geographic pattern of habitation. 

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

  • To move slowly towards, usually in groups. 

  • 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. 

transmigrate

verb
  • To migrate to another country. 

  • To pass into another body after death. 

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