communion vs theology

communion

noun
  • Holy Communion. 

  • A form of ecclesiastical unity between the Roman Church and another, so that the latter is considered part of the former. 

  • A joining together of minds or spirits; a mental connection. 

theology

noun
  • A particular belief within a religion. 

  • Synonym of religious studies 

  • Subjective marginal details. 

  • An organized method of interpreting spiritual works and beliefs into practical form. 

  • The study of God, a god, or gods; and of the truthfulness of religion in general. 

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