institution vs sodality

institution

noun
  • A long established and respected organization, particularly one involved with education, public service, or charity work. 

  • Any long established and respected place or business. 

  • The act of instituting something. 

  • A custom or practice of a society or community. 

  • The building or buildings which house such an organization. 

  • A person long established in a place, position, or field. 

  • A mental institution. 

  • The act by which a bishop commits a cure of souls to a priest. 

sodality

noun
  • A fraternity, a society or association. 

  • Companionship. 

  • Spiritual communion with a divine being, a fellowship 

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