chanson vs madrigal

chanson

noun
  • Any song with French words, but more specifically a classic, lyric-driven French song. 

madrigal

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

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

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

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