lead on vs talk through one's hat

lead on

verb
  • to mislead, to try to make someone believe a lie. 

  • to encourage with the illusion of a romantic relationship. 

  • Used other than figuratively or idiomatically: see lead, on. 

talk through one's hat

verb
  • To assert something as true or valid; to bluff. 

  • To speak lacking expertise, authority, or knowledge; to invent or fabricate facts. 

How often have the words lead on and talk through one's hat occurred in a corpus of books? (source: Google Ngram Viewer )