covert baron vs disguised

covert baron

adj
  • Covert, under coverture; married. 

disguised

adj
  • Wearing a disguise; dressed in strange or unusual clothes, or taking on a changed appearance, especially to conceal one’s identity. 

  • Made to appear as something other than it is, hidden in outward form. 

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