forswear vs kiss goodbye

forswear

verb
  • To renounce or deny something, especially under oath. 

  • To commit perjury; to break an oath. 

kiss goodbye

verb
  • To give something up reluctantly. 

  • To kiss prior to departing. 

How often have the words forswear and kiss goodbye occurred in a corpus of books? (source: Google Ngram Viewer )