ceremony vs psalmody

ceremony

noun
  • A ritual, with religious or cultural significance. 

  • An official gathering to celebrate, commemorate, or otherwise mark some event. 

  • A formal socially established behaviour, often in relation to people of different ranks; formality. 

  • Show of magnificence, display, ostentation. 

psalmody

noun
  • The singing or the writing of psalms. 

  • A collection of psalms. 

verb
  • To celebrate in psalms. 

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