progress vs royal household

progress

noun
  • An official journey made by a monarch or other high personage; a state journey, a circuit. 

  • Specifically, advancement to a higher or more developed state; development, growth. 

  • Movement onwards or forwards or towards a specific objective or direction; advance. 

  • Movement or advancement through a series of events, or points in time; development through time. 

  • Science has made extraordinary progress in the last fifty years. 

verb
  • To develop. 

  • To expedite. 

  • To move, go, or proceed forward; to advance. 

  • To improve; to become better or more complete. 

royal household

noun
  • The immediate family and principal courtiers and servants of a monarch 

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