pilotage vs superintendency

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. 

superintendency

noun
  • The condition of being a superintendent 

  • The act of superintending 

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