ruling vs stipulation

ruling

noun
  • An order or a decision on a point of law from someone in authority. 

adj
  • That rules; predominant; chief; reigning; controlling. 

stipulation

noun
  • Something that is stated or stipulated as a condition of an agreement. 

  • The situation, arrangement, and structure of the stipules. 

  • The act of stipulating; a contracting or bargaining; an agreement. 

  • A goal to be achieved in a chess problem; for example, to checkmate Black within a specified number of moves. 

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