chameleonic vs unsettled

chameleonic

adj
  • Resembling a chameleon: readily changing color or other attributes 

unsettled

adj
  • Unpaid. 

  • Not populated, having no settlers or other inhabitants. 

  • Disturbed, upset. 

  • Not in a steady condition, uncertain, subject to change. 

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