ambulance vs conveyance

ambulance

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

  • A mobile field hospital. 

verb
  • To transport by ambulance. 

conveyance

noun
  • A means of transporting, especially a vehicle. 

  • An instrument transferring title of an object from one person or group of persons to another. 

  • An act or instance of conveying. 

verb
  • To transfer (the title) of an object from one person or group of persons to another. 

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