airborne vs roving

airborne

adj
  • In or carried by the air. 

  • Fitted to an aircraft. 

  • In flight. 

  • Transported by air in an aircraft. 

noun
  • Military infantry intended to be transported by air and delivered to the battlefield by parachute or helicopter. 

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 airborne and roving occurred in a corpus of books? (source: Google Ngram Viewer )