leach vs mull

leach

verb
  • To purge a soluble matter out of something by the action of a percolating fluid. 

  • To part with soluble constituents by percolation. 

noun
  • A tub or vat for leaching ashes, bark, etc. 

  • A jelly-like sweetmeat popular in the fifteenth century. 

  • A quantity of wood ashes, through which water passes, and thus imbibes the alkali. 

mull

verb
  • To powder; to pulverize. 

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

  • To dull or stupefy. 

  • 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. 

noun
  • 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. 

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

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

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