jack off vs shake hands with the unemployed

jack off

verb
  • To masturbate. 

  • To stimulate or please oneself in an unproductive or idle way. 

  • To manually stimulate someone sexually, generally a male. 

shake hands with the unemployed

verb
  • To masturbate. 

  • To urinate. 

How often have the words jack off and shake hands with the unemployed occurred in a corpus of books? (source: Google Ngram Viewer )