yap vs yell

yap

verb
  • To talk, especially excessively; to chatter. 

  • Of a small dog, to bark. 

  • To rob or steal from (someone). 

noun
  • The high-pitched bark of a small dog, or similar. 

  • The mouth, which produces speech. 

  • Casual talk; chatter. 

  • A badly behaved child; a brat. 

yell

verb
  • To shout; holler; make a loud sound with the voice. 

  • To tell someone off in a loud and angry manner. 

  • To convey by shouting. 

noun
  • A phrase to be shouted. 

  • A shout. 

adj
  • dry (of cow) 

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