consistory vs synod

consistory

noun
  • A solemn assembly or council. 

  • An assembly of prelates; a session of the college of cardinals at Rome. 

  • The spiritual court of a diocesan bishop held before his chancellor or commissioner in his cathedral church or elsewhere. 

  • A church tribunal or governing body, especially of elders in a Reformed church. 

synod

noun
  • An assembly or council having civil authority; a legislative body. 

  • A conjunction of two or more of the heavenly bodies. 

  • An ecclesiastic council or meeting to consult on church matters. 

  • An administrative division of churches, either the entire denomination, as in the Lutheran Church–Missouri Synod, or a mid-level division (middle judicatory, district) as in the Evangelical Lutheran Church in America 

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