pursuivant vs warrant officer

pursuivant

noun
  • A warrant officer. 

  • A functionary of lower rank than a herald, but discharging similar duties; called also pursuivant at arms; an attendant of the heralds, e.g. in the College of Arms. 

  • A royal messenger, (particularly) one with the authority to execute warrants. 

  • A Grand Lodge Officer who guards the inner door during a meeting of the Grand Lodge 

warrant officer

noun
  • An officer assigned to execute warrants and other writs. 

  • An officer holding rank by virtue of a warrant rather than a commission. 

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