hold to ransom vs shanghai

hold to ransom

verb
  • To hold (someone) hostage until a ransom is paid. 

shanghai

verb
  • To commandeer, hijack, or otherwise (usually wrongfully) appropriate a place or thing. 

  • To trick a suspect into entering a jurisdiction in which they can be lawfully arrested. 

  • To press-gang sailors, especially (historical) for shipping or fishing work. 

  • To force or trick someone to go somewhere or do something against their will or interest, particularly 

  • To hit with a slingshot. 

  • To transfer a serviceman against their will. 

noun
  • Synonym of slingshot. 

  • A kind of dart game in which players are gradually eliminated ("shanghaied"), usually either by failing to reach a certain score in 3 quick throws or during a competition to hit a certain prechosen number and then be the first to hit the prechosen numbers of the other players. 

How often have the words hold to ransom and shanghai occurred in a corpus of books? (source: Google Ngram Viewer )