cover story vs guise

cover story

noun
  • A fictitious account that is intended to hide one's real motive. 

  • A story included in a publication that is highlighted on the front cover. 

guise

noun
  • Misleading appearance; cover, cloak. 

  • External appearance in manner or dress; appropriate indication or expression; garb; shape. 

  • Customary way of speaking or acting; fashion, manner, practice (often used formerly in such phrases as "at his own guise"; that is, in his own fashion, to suit himself.) 

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