migrant vs roaming

migrant

noun
  • A person who leaves one place in order to permanently settle in another. 

  • A migratory animal, in particular a migratory bird. 

  • Traveller or worker who moves from one region or country to another. 

  • Any of various pierid butterflies of the genus Catopsilia. Also called an emigrant. 

adj
  • Migratory. 

roaming

noun
  • An instance of wandering. 

  • Using the OS service of manipulating folders and documents from different PC devices by a registered user. 

  • The use of a network or service from different locations or devices. 

  • The ability to use a cell phone outside of its original registering zone. 

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