autonomous vs unattached

autonomous

adj
  • Acting on one's own or independently; of a child, acting without being governed by parental or guardian rules. 

  • Self-governing. Intelligent, sentient, self-aware, thinking, feeling, governing independently. 

  • Used with no subject, indicating an unknown or unspecified agent; used in similar situations as the passive in English (the difference being that the theme in the English passive construction is the subject, while in the Celtic autonomous construction the theme is the object and there is no subject). 

unattached

adj
  • Not connected with or belonging to a particular group or organization. 

  • Not attached or joined; disconnected. 

  • Not married and not involved in a romantic relationship. 

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