cruising vs pilotage

cruising

noun
  • Sailing about without an exact destination, usually for pleasure. 

  • Driving around without an exact destination as a social activity 

  • Walking or driving about a locality in search of a casual sex partner, especially among gay males. 

pilotage

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

  • The occupation of a pilot. 

  • The fee paid to a pilot. 

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