crystallization vs grouping

crystallization

noun
  • The process or the result of becoming more definite or precise. 

  • The act or process by which a substance in solidifying assumes the form and structure of a crystal, or becomes crystallized. 

  • The formation of a solid from a solution, melt, vapour or from a different solid phase 

  • The body formed by crystallizing. 

grouping

noun
  • The action of the verb to group. 

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

  • Shot grouping. 

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