aft vs tanker

aft

noun
  • The stern portion of a vessel. 

adv
  • At, near, or towards the stern of a vessel (with the frame of reference within the vessel). 

adj
  • located at the back of a boat, ship, or airplane 

tanker

noun
  • A tank ship, a vessel used to transport large quantities of liquid. 

  • A longboard. 

  • An aircraft built or modified to carry water and/or fire retardant for dropping on wildfires. 

  • A tank truck. 

  • A fuel tanker, petrol tanker, road tanker. 

  • An aircraft carrying a large supply of jet fuel or avgas for aerial refueling of other aircraft, plus equipment allowing the in-air transfer of fuel. 

  • A tank car. 

  • Member of a tank crew, or of an armoured unit. 

verb
  • To carry more fuel than necessary for a flight, in order to avoid having to refuel at a destination where fuel is more expensive or in short supply. 

  • To transport (oil, etc.) in a tanker. 

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