participation vs synergism

participation

noun
  • The state of being related to a larger whole. 

  • The act of participating, of taking part in something. 

  • The process during which individuals, groups and organizations are consulted about or have the opportunity to become actively involved in a project or program of activity. 

  • An ownership interest or profit-sharing right. 

synergism

noun
  • synergy 

  • The theological doctrine that salvation is brought about by a combination of human will and divine grace 

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