epithalamic vs espousal

epithalamic

adj
  • Of or pertaining to the epithalamus. 

  • Belonging to, or designed for, an epithalamium. 

espousal

noun
  • A wedding ceremony. 

  • Adoption of a plan, cause, or idea. 

  • A betrothal. 

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