marriageable vs spousal

marriageable

adj

  • Suitable for marriage; nubile. 

noun

  • One who is suitable for marriage. 

spousal

adj

  • of or relating to marriage 

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

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