participation vs rivalry

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. 

rivalry

noun
  • The characteristic of being a rivalrous good, such that it can be consumed or used by only one person at a time. 

  • An ongoing relationship between (usually two) rivals who compete for superiority. 

  • Any competition between two or more things or factors. 

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