matrimonial vs spousal

matrimonial

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

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

spousal

adj
  • of or relating to marriage 

  • of or relating to a spouse, spouses; to the relationship between spouses 

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