let go vs sandbag

let go

verb
  • To dismiss from employment. 

  • To release from one's grasp; to go from a state of holding on to a state of no longer holding on. 

  • To ignore (a comment, etc.). 

  • To emotionally disengage or to distract oneself from a situation. 

  • To fail to maintain a standard of appearance, behavior, or performance. 

  • Used other than figuratively or idiomatically: see let, go. 

  • To gain weight 

sandbag

noun
  • A sturdy sack filled with sand, generally used in large numbers to make defensive walls against flooding, bullets, or shrapnel. 

  • An engraver's leather cushion, etc. 

  • A small bag filled with sand and used as a cudgel. 

  • A deceptive play whereby a player with a strong hand bets weakly or passively. 

verb
  • To strike someone with a sandbag or other object to disable or render unconscious. 

  • To construct a barrier of sandbags around. 

  • To pretend to drink early on so that, as the night draws on, one can drink everybody else "under the table". 

  • To conceal or misrepresent one's true position, potential, or intent in order to gain an advantage. 

  • To deceive someone by pretending to be weak, or (card games) by pretending to have a weak hand. 

How often have the words let go and sandbag occurred in a corpus of books? (source: Google Ngram Viewer )