mull vs rule

mull

noun
  • The gauze used in bookbinding to adhere a text block to a book's cover. 

  • An inferior kind of madder prepared from the smaller roots or the peelings and refuse of the larger. 

  • A stew of meat, broth, milk, butter, vegetables, and seasonings, thickened with soda crackers. 

  • dirt; rubbish 

  • A thin, soft muslin. 

  • A promontory. 

  • A snuffbox made of the small end of a horn. 

  • Marijuana that has been chopped to prepare it for smoking. 

verb
  • To chop marijuana so that it becomes a smokable form. 

  • To dull or stupefy. 

  • To powder; to pulverize. 

  • To heat and spice something, such as wine. 

  • To work (over) mentally; to cogitate; to ruminate. 

  • To join two or more individual windows at mullions. 

rule

noun
  • A straight line (continuous mark, as made by a pen or the like), especially one lying across a paper as a guide for writing. 

  • A determinate method prescribed for performing any operation and producing a certain result. 

  • A regulating principle. 

  • A ruler; device for measuring, a straightedge, a measure. 

  • A normal condition or state of affairs. 

  • A regulation, law, guideline. 

  • An order regulating the practice of the courts, or an order made between parties to an action or a suit. 

  • The act of ruling; administration of law; government; empire; authority; control. 

verb
  • To establish or settle by, or as by, a rule; to fix by universal or general consent, or by common practice. 

  • To regulate, be in charge of, make decisions for, reign over. 

  • To decide judicially. 

  • To mark (paper or the like) with rules (lines). 

  • To excel. 

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