corps vs working party

corps

noun
  • An organized group of people united by a common purpose. 

  • A battlefield formation composed of two or more divisions. 

working party

noun
  • A group of people working together on a particular project or subject. 

  • A committee or group appointed to study and report on a particular question and make recommendations based on its findings. 

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