anthem vs chanting

anthem

noun
  • A choral or vocal composition, often with a religious or political lyric. 

  • A very popular song or track. 

  • A hymn of praise or loyalty. 

verb
  • To celebrate with anthems. 

chanting

noun
  • Singing, especially as a chant is sung. 

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