master plan vs stratagem

master plan

noun
  • A comprehensive document that sets out an overall strategy; the strategy itself. 

  • A small-scale graphic outline that shows all the major elements of a project. 

stratagem

noun
  • Specifically, such a tactic or artifice in military operation. 

  • Cunning and artifice in general. 

  • Military deception or artifice. 

  • A tactic or artifice designed to gain the upper hand, especially one involving underhanded dealings or deception. 

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