lead on vs suck in

lead on

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

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

  • to encourage with the illusion of a romantic relationship. 

suck in

verb
  • To draw inward. 

  • To cause (someone) to become slowly more and more involved in some business or situation that may not be to their advantage. 

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