come on to vs seduce

come on to

verb
  • To make a romantic or sexual advance to. 

  • To start to. 

seduce

verb
  • To have sexual intercourse with. 

  • To win over or attract. 

  • To beguile or lure (someone) away from duty, accepted principles, or proper conduct; to lead astray. 

  • To entice or induce (someone) to engage in a sexual relationship. 

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