grouping vs placing

grouping

noun
  • The action of the verb to group. 

  • A collection of things or people united as a group. 

  • Shot grouping. 

placing

noun
  • The action by which something is placed; placement; positioning. 

  • The position of a competitor at the end of a race. 

  • The condition of being placed. 

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