flagship vs headline

flagship

verb
  • To act as a flagship for. 

noun
  • The most important one out of a related group. 

  • The ship occupied by the fleet's commander (usually an admiral); it denotes this by flying his flag. 

  • The ship regarded as most important out of a group, e.g. a nation's navy or company's fleet. 

headline

verb
  • To present as the main attraction; to have top billing, to be the main attraction. 

  • To give a headline to a page or section of a text. 

noun
  • The heading or title of a magazine or newspaper article. 

  • The top-billed attraction. 

  • A headrope. 

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