expedition vs logjam

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. 

logjam

noun
  • A clog or such jam or mess that halts or greatly delays progress. 

  • An excess of logs being conveyed on a river, so that their motion halts. 

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