clack vs yak

clack

noun
  • Chatter; prattle. 

  • The tongue. 

  • An abrupt, sharp sound, especially one made by two hard objects colliding repetitively; a sound midway between a click and a clunk. 

  • Anything that causes a clacking noise, such as the clapper of a mill, or a clack valve. 

verb
  • To chatter or babble; to utter rapidly without consideration. 

  • To cause to make a sudden, sharp noise, or succession of noises; to click. 

  • To make a sudden, sharp noise, or succession of noises; to click. 

  • To cut the sheep's mark off (wool), to make the wool weigh less and thus yield less duty. 

yak

noun
  • A talk, particular an informal talk; chattering; gossip. 

  • An ox-like mammal native to the Himalayas, Mongolia, Burma, and Tibet with dark, long, and silky hair, a horse-like tail, and a full, bushy mane. 

  • A laugh. 

  • Vomit. 

  • A kayak. 

verb
  • To talk, particularly informally but persistently; to chatter or prattle. 

  • To vomit, usually as a result of excessive alcohol consumption. 

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