gab vs yackety-yak

gab

noun
  • Idle chatter. 

  • The mouth or gob. 

  • One of the open-forked ends of rods controlling reversing in early steam engines. 

verb
  • To talk or chatter a lot, usually on trivial subjects. 

yackety-yak

noun
  • prolonged chatter; uninterrupted, idle talk; gossip 

verb
  • To talk pointlessly and uninterruptedly. 

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