point of sail vs tactic

point of sail

noun
  • A sailing vessel's course in relation to the wind direction. 

tactic

noun
  • A maneuver used against an enemy. 

  • A sequence of moves that limits the opponent's options and results in an immediate and tangible advantage, typically in the form of material. 

  • A maneuver, or action calculated to achieve some end. 

adj
  • Describing a polymer whose repeat units are identical 

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