shoot one's mouth off vs twitter

shoot one's mouth off

verb
  • To make reckless or exaggerated statements. 

twitter

verb
  • To utter a succession of chirps. 

  • To make the sound of a half-suppressed laugh; to titter; to giggle. 

  • To have a slight trembling of the nerves; to be excited or agitated. 

  • (of a person) To talk in an excited or nervous manner. 

noun
  • The sound of a succession of chirps as uttered by birds. 

  • A tremulous broken sound. 

  • Unwanted flicker that occurs in interlaced displays when the image contains vertical detail that approaches the horizontal resolution of the video format. 

  • A slight trembling of the nerves. 

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