flagship vs old man

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. 

old man

noun
  • A unit's commanding officer, or the commander of a naval vessel, irrespective of age. 

  • The state of human nature without the spiritual transformation brought about by redemption through Jesus Christ. 

  • Synonym of southernwood 

  • An elderly man. 

  • A husband, or male significant other, irrespective of age. 

  • Used attributively to denote something of exceptional size, strength, age etc. 

  • One's father. 

  • One's male employer, irrespective of age. 

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