doxology vs madrigal

doxology

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

madrigal

noun
  • A short poem, often pastoral, and suitable to be set to music. 

  • A song for a small number of unaccompanied voices; from 13th century Italy. 

  • A polyphonic song for about six voices, from 16th century Italy. 

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