flagship vs focal

flagship

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. 

verb
  • To act as a flagship for. 

focal

noun
  • The central or most important element of something; a focal element. 

  • The individual who is the focus of a study or review, when the study or review is based on that individual's interactions with others. 

  • A sign or similar type of marketing material designed to draw attention to special deals. 

  • An object that is used to focus concentration when performing magic. 

  • A representative of a group or class of people within an organizational system. 

  • An exemplar of a concept. 

  • A major point of interest; an attraction. 

adj
  • Belonging to, concerning, or located at a focus. 

  • Limited to a small area. 

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