clear-out vs discarding

clear-out

noun
  • The act of emptying a room or space. 

  • A semicircular sweep with the ball grasped firmly in both hands. 

discarding

noun
  • The act by which something is discarded; a throwing away. 

  • Discarded material. 

How often have the words clear-out and discarding occurred in a corpus of books? (source: Google Ngram Viewer )