free-roaming vs roving

free-roaming

adj
  • Having the ability to move about unconstrained by reins, leashes, fences, cages, barns, and so on. 

  • Allowing the player to move freely through a virtual world and/or choose the game narrative and objectives at will; Open World. 

  • Not orbiting a gravitational center. 

roving

adj
  • Moving about; having no fixed or permanent abode; travelling from place to place. 

  • Of the eyes or gaze, inspecting all over; not staying fixed on on subject. 

noun
  • A long and narrow bundle of fibre, usually used to spin woollen yarn or in felting. 

  • The process of giving the first twist to yarn. 

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