carol vs doxology

carol

noun
  • A ballad or song of joy. 

  • A (usually traditional) religious or secular song sung at Christmastime. 

  • A round dance accompanied by singing. 

verb
  • To sing carols; especially to sing Christmas carols in a group. 

  • To praise or celebrate in song. 

  • To sing in a joyful manner. 

  • To sing (a song) cheerfully. 

  • To participate in a carol (a round dance accompanied by singing). 

doxology

noun
  • An expression of praise to God, especially a short hymn sung as part of a Christian worship service. 

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