expedition vs outing

expedition

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. 

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

outing

noun
  • A pleasure trip or excursion. 

  • A performance in public, for example in a drama, film, on a musical album, as a sports contestant etc. 

  • The practice of publicly revealing that a person is homosexual or transgender without that person's consent. 

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