landfill vs unload

landfill

verb
  • To dispose of (garbage) by burying it at a landfill site. 

noun
  • A site at which refuse is buried under layers of earth. 

  • The material so disposed of. 

unload

verb
  • To get rid of or dispose of. 

  • To reduce the vertical load factor on (an airplane's wing or other lifting surface), typically by pitching downwards toward the ground to decrease angle of attack and reduce the amount of lift generated. 

  • To remove (the load or cargo) from a vehicle, etc. 

  • To deposit one's load or cargo. 

  • To give vent to or express; to unburden oneself of. 

  • To discharge, pour, or expel. 

  • To remove the load or cargo from (a vehicle, etc.). 

  • To remove the charge from. 

  • To deliver forcefully. 

  • To ejaculate, particularly within an orifice. 

  • To remove (something previously loaded) from memory. 

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