lieutenant junior grade vs premier

lieutenant junior grade

noun
  • A commissioned officer of the United States Navy whose rank is above an ensign's and below a lieutenant, or a corresponding rank in other navies. 

  • A commissioned officer in the United States Coast Guard, Public Health Service, or National Atmospheric and Oceanic Administration whose rank is above an ensign and below a lieutenant. 

premier

noun
  • The first lieutenant or other second-in-command officer of a ship. 

  • The champion team of a particular season (especially as used in Australian rules football). 

  • The government leader in a legislative congress or leader of a government-level administrative body; the head of government. 

  • The leader of a state or provincial government and cabinet. 

  • The prime minister. 

adj
  • Most ancient. 

  • Foremost; first or highest in quality or degree. 

verb
  • To perform, display or exhibit for the first time. 

  • To govern in the role of premier. 

How often have the words lieutenant junior grade and premier occurred in a corpus of books? (source: Google Ngram Viewer )