hymn vs plaint

hymn

noun
  • A song of praise or worship, especially a religious one. 

verb
  • To praise or extol in hymns. 

  • To sing a hymn. 

plaint

noun
  • An accusation. 

  • A complaint. 

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