expedition vs showstopper

expedition

verb
  • To take part in a trip or expedition; to travel. 

noun
  • An important or long journey, for example a march or a voyage 

  • The group of people making such excursion. 

  • A military journey; an enterprise against some enemy or into enemy territory. 

  • A trip, especially a long one, made by a person or a group of people for a specific purpose 

  • The process or activities of performing expediter tasks. 

showstopper

noun
  • A performance or segment of a theatrical production that induces a positive audience reaction strong enough to pause the production. 

  • A software bug that must be fixed before any further development is possible. 

  • Any impediment that prevents all further progress. 

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