corps vs pep rally

corps

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

  • A battlefield formation composed of two or more divisions. 

pep rally

noun
  • A meeting or gathering for the purpose of instilling enthusiasm and motivation in attenders. 

  • An extracurricular school activity in which students gather to express support for the school sports team before a game. 

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