impersonate vs portray

impersonate

verb
  • To pretend to be (a different person); to assume the identity of. 

  • To operate with the permissions of a different user account. 

portray

verb
  • To play a role; to depict a character, person, situation, or event. 

  • To describe in words; to convey. 

  • To paint or draw the likeness of. 

  • To represent by an image or look. 

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