lancer vs troopship

lancer

noun
  • A cavalry soldier armed with a lance weapon. 

  • Any of various Asian hesperiid butterflies of the genus Plastingia. 

  • One who lances something. 

troopship

noun
  • A ship used to transport military troops. 

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