conjugality vs connubiality

conjugality

noun
  • The condition of being conjugal. 

  • The conjugal state; marriage; sexual intercourse. 

connubiality

noun
  • Something characteristic of the conjugal state; an expression of connubial tenderness. 

  • The quality of being connubial. 

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