driver vs flagship

driver

noun
  • a kind of sail, smaller than a fore and aft spanker on a square-rigged ship, a driver is tied to the same spars. 

  • A person who drives some other vehicle. 

  • A golf club used to drive the ball a great distance. 

  • A mallet. 

  • One who drives something, in any sense of the verb drive. 

  • A cooper's hammer for driving on barrel hoops. 

  • A screwdriver. 

  • Something that drives something, in any sense of the verb drive. 

  • A pilot (person who flies aircraft). 

  • A device driver; a program that acts as an interface between an application and hardware, written specifically for the device it controls. 

  • A person who drives a motorized vehicle such as a car or a bus. 

  • A tamping iron. 

flagship

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

  • The most important one out of a related group. 

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

verb
  • To act as a flagship for. 

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