emigrant vs emigree

emigrant

noun
  • Someone who leaves a country to settle in a new country. 

  • Any of various pierid butterflies of the genus Catopsilia. Also called a migrant. 

emigree

noun
  • a migrant, one who moves from one region to another. 

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