corps vs workgroup

corps

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

  • A battlefield formation composed of two or more divisions. 

workgroup

noun
  • A group of workers engaged in a series of collaborative tasks who usually work together. 

  • A computer network created for use by such groups. 

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