hoodwink vs string on

hoodwink

verb
  • To deceive using a disguise; to bewile, dupe, mislead. 

noun
  • An act of hiding from sight, or something that cloaks or hides another thing from view. 

string on

verb
  • To continue to convince (someone) of something untrue; to maintain a lie or scam aimed at (someone). 

How often have the words hoodwink and string on occurred in a corpus of books? (source: Google Ngram Viewer )