shoot one's mouth off vs yatter

shoot one's mouth off

verb

  • To make reckless or exaggerated statements. 

yatter

verb

  • To natter; to prattle; to chatter mindlessly. 

noun

  • Natter; prattle; mindless chatter. 

How often have the words shoot one's mouth off and yatter occurred in a corpus of books? (source: Google Ngram Viewer )