landfill vs rubbish pile

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. 

rubbish pile

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