disguised vs unidentifiable

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. 

unidentifiable

adj
  • Difficult, if not impossible, to identify or name 

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