immigrant vs migratorial

immigrant

adj
  • Of or relating to immigrants or the act of immigrating. 

noun
  • A plant or animal that establishes itself in an area where it previously did not exist. 

  • A non-native person who comes to a country from another country to permanently settle there. 

migratorial

adj
  • migratory 

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