contribution vs endowment

contribution

noun
  • Something given or offered that adds to a larger whole. 

  • An amount of money given toward something. 

  • The act of contributing. 

  • The taking part, often with the idea that it has led to (scientific etc.) progress. 

endowment

noun
  • Something with which a person or thing is endowed. 

  • Property or funds invested for the support and benefit of a person or not-for-profit institution. 

  • Endowment assurance or pure endowment. 

  • A ceremony designed to prepare participants for their role in the afterlife. 

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