disguise vs keep out of sight

disguise

verb
  • To change the appearance of (a person or thing) so as to hide, or to assume an identity. 

  • To avoid giving away or revealing (something secret); to hide by a false appearance. 

noun
  • The act or state of disguising, notably as a ploy. 

  • The appearance of something on the outside which masks what’s beneath. 

  • Material (such as clothing, makeup, a wig) used to alter one’s visual appearance in order to hide one's identity or assume another. 

keep out of sight

How often have the words disguise and keep out of sight occurred in a corpus of books? (source: Google Ngram Viewer )