roaming vs unsteadfast

roaming

noun
  • 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. 

  • An instance of wandering. 

unsteadfast

adj
  • Not steadfast; wavering, unfaithful. 

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