plainsong vs ragtime

plainsong

noun
  • A form of monophonic chant in unison using the Gregorian scale, sung in various Christian churches. 

  • A plain unvarnished statement, without exaggeration. 

  • A cantus firmus or theme chosen for contrapuntal treatment; so called because often an actual fragment of plain-song. 

  • The simple notes of an air, without ornament or variation. 

ragtime

noun
  • A musical form having a rhythm characterized by strong syncopation in the melody with a regularly accented accompaniment. 

  • A piece of music in this style. 

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