string along vs talk through one's hat

string along

verb
  • To keep somebody falsely believing that one has certain intentions. 

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 string along and talk through one's hat occurred in a corpus of books? (source: Google Ngram Viewer )