national anthem vs psalm

national anthem

noun
  • The official song of a nation or sovereign state, generally of a patriotic nature and played at events to celebrate or honor said state. 

  • The official song of a constituent state of a country. 

psalm

noun
  • A sacred song; a poetical composition for use in the praise or worship of God. 

  • One of the hymns by David and others, collected into one book of the Old Testament, or a modern metrical version of such a hymn for public worship. 

verb
  • To extol in psalms; to make music; to sing 

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