lasting vs unattached

lasting

noun
  • A durable woollen material formerly used for women's shoes. 

  • The act or process of shaping footwear on a last. 

adj
  • Persisting for an extended period of time. 

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 lasting and unattached occurred in a corpus of books? (source: Google Ngram Viewer )