formation vs pocket billiards

formation

noun
  • An arrangement of players designed to facilitate certain plays. 

  • An arrangement of moving troops, ships, or aircraft, such as a wedge, line abreast, or echelon. Often "in formation". 

  • A structure made of two categories, two functors from the first to the second category, and a transformation from one of the functors to the other. 

  • The act of assembling a group or structure. 

  • The process during which something comes into being and gains its characteristics. 

  • Something possessing structure or form. 

  • A layer of rock of common origin. 

  • A grouping of military units or smaller formations under a command, such as a brigade, division, wing, etc. 

  • The process of influencing or guiding a person to a deeper understanding of a particular vocation. 

pocket billiards

noun
  • Any of a family of billiards games played on a specific class of billiards table, having six receptacles called pockets along the rails, in which balls are deposited as the main goal of play. 

  • Synonym of pocket pool 

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