ambulance vs sickbay

ambulance

noun
  • A mobile field hospital. 

  • An emergency vehicle designed for transporting seriously ill or injured people to a hospital. 

verb
  • To transport by ambulance. 

sickbay

noun
  • A room or area for the treatment of the sick or injured in a school. 

  • A place used as a hospital on board a ship, on a spaceship (in science fiction). 

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