pilotage vs preeminence

pilotage

noun
  • The occupation of a pilot. 

  • The use of landmarks to guide a vessel or aircraft to its destination. 

  • The fee paid to a pilot. 

preeminence

noun
  • High importance; superiority. 

  • The status of being preeminent, dominant or ascendant. 

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