nonresident vs working for oneself

nonresident

adj
  • not resident; not residing in the place in question 

noun
  • one who is not a resident; an alien; a foreigner 

  • A person living in a country who is no legal permanent resident. 

working for oneself

How often have the words nonresident and working for oneself occurred in a corpus of books? (source: Google Ngram Viewer )