chubber vs lead in one's pencil

chubber

noun
  • An erect penis. 

  • A chubby person. 

  • An outdoorsman. 

lead in one's pencil

noun
  • A state of erection of one's penis. 

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

How often have the words chubber and lead in one's pencil occurred in a corpus of books? (source: Google Ngram Viewer )