fest vs grouping

fest

noun
  • A gathering for a specified reason or occasion. 

  • An event in which the act denoted by the previous noun occurs. 

grouping

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

  • The action of the verb to group. 

  • Shot grouping. 

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