esprit de corps vs synergy

esprit de corps

noun
  • A shared spirit of comradeship, enthusiasm, and devotion to a cause among the members of a group, for example of a military unit. 

synergy

noun
  • Benefits resulting from combining different groups, people, objects or processes. 

  • The cooperation of two or more nerves, muscles, organs, etc. 

  • A synonym of binding energy. 

  • The combined action of two or more drugs where the effects are stronger than their mere sum. 

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