pilotage vs seafaring

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. 

seafaring

noun
  • The work, or calling of a sailor. 

  • The act, process, or practice of travelling the seas 

adj
  • Living one's life at sea. 

  • Fit to travel on the sea; seagoing. 

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