clear-out vs subtraction

clear-out

noun
  • The act of emptying a room or space. 

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

subtraction

noun
  • The removal of something. 

  • The process of subtracting a number from another. 

  • A calculation involving subtracting. 

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