cover story vs rationalization

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. 

rationalization

noun
  • The concealment of true motivation in some non-threatening way. 

  • The process or result of rationalizing. 

  • The simplification of an expression without changing its value. 

  • A reorganization of a company or organization in order to improve its efficiency. 

  • A statement of one's motives, or of the causes of some event. 

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