ocean liner vs yacht

ocean liner

noun
  • a narrow-beam passenger ship designed for high speed trans-oceanic travel 

yacht

noun
  • A slick and light ship for making pleasure trips or racing on water, having sails but often motor-powered. At times used as a residence offshore on a dock. 

  • Any vessel used for private, noncommercial purposes. 

verb
  • To sail, voyage, or race in a yacht. 

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