mouth off about vs rant

mouth off about

rant

noun
  • A wild, emotional, and sometimes incoherent articulation. 

  • A criticism done by ranting. 

  • A type of dance step usually performed in clogs, and particularly (but not exclusively) associated with the English North West Morris tradition. The rant step consists of alternately bringing one foot across and in front of the other and striking the ground, with the other foot making a little hop. 

verb
  • To speak or shout at length in uncontrollable anger. 

  • To dance rant steps. 

  • To disseminate one's own opinions in a - typically - one-sided, strong manner. 

  • To criticize by ranting. 

How often have the words mouth off about and rant occurred in a corpus of books? (source: Google Ngram Viewer )