smuggle vs stow away

smuggle

verb
  • To import or export, illicitly or by stealth, without paying lawful customs charges or duties 

  • To thrash or be thrashed by a bear's claws, or to swipe at or be swiped at by a person's arms in a bearlike manner. 

  • To bring in surreptitiously 

stow away

verb
  • to obtain passage (on a ship or similar vehicle) by secreting oneself inside before departure 

  • to stow or secure aloof in a safe place 

How often have the words smuggle and stow away occurred in a corpus of books? (source: Google Ngram Viewer )