mull vs patter

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. 

patter

verb
  • To spatter; to sprinkle. 

  • To speak glibly and rapidly, as does an auctioneer or a sports commentator. 

  • To make irregularly repeated sounds of low-to-moderate magnitude and lower-than-average pitch. 

noun
  • A soft repeated sound, as of rain falling, or feet walking on a hard surface. 

  • One who pats. 

  • Glib and rapid speech, such as from an auctioneer or a sports commentator. 

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