gag vs quahog

gag

verb
  • To choke; to retch. 

  • To restrain someone's speech by blocking his or her mouth. 

  • To cause to heave with nausea. 

  • To pry or hold open by means of a gag. 

  • To experience the vomiting reflex. 

  • To restrain someone's speech without using physical means. 

  • To astonish (someone); to be at a loss for words. 

noun
  • A joke or other mischievous prank. 

  • Mycteroperca microlepis, a species of grouper. 

  • Any suppression of freedom of speech. 

  • An order or rule forbidding discussion of a case or subject. 

  • A device to restrain speech, such as a rag in the mouth secured with tape or a rubber ball threaded onto a cord or strap. 

  • a device or trick used to create a practical effect; a gimmick 

  • A convulsion of the upper digestive tract. 

quahog

verb
  • To dig for quahogs. 

noun
  • The largest size of such an edible clam, generally considered only fit for use in chowders and other clam dishes. 

  • An edible clam with a hard shell found along the Atlantic Coast of North America, from species Mercenaria mercenaria, formerly Venus mercenaria. 

  • A similar edible clam found along coasts around the North Atlantic, generally in deeper waters, the ocean quahog, black quahog, mahogany clam or Icelandic cyprine, Arctica islandica 

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