epithalamium vs matrimonial

epithalamium

noun
  • A song or poem celebrating a marriage. 

matrimonial

noun
  • A classified advertisement describing an individual who wishes to find a marriage partner. 

adj
  • Of, or having to do with matrimony and marriage. 

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