rodomontade vs shoot one's mouth off

rodomontade

adj

  • Pretentiously boastful. 

noun

  • Vain boasting; a rant; pretentious behaviour. 

shoot one's mouth off

verb

  • To make reckless or exaggerated statements. 

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