lead on vs talk out of one's ass

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 out of one's ass

verb
  • To exaggerate, lie, or speak nonsense. 

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