chanter vs chorister

chanter

noun
  • A priest who sings in a chantry. 

  • The pipe of a bagpipe on which the melody is played. 

  • One who chants or sings. 

  • The hedge sparrow. 

chorister

noun
  • A singer in a choir. 

  • A director or leader of a choral group. 

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