synergy vs team effort

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. 

team effort

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