driver's compartment vs taxicab

driver's compartment

noun
  • Synonym of cab (compartment at the front of a truck or train for the driver). 

taxicab

noun
  • a vehicle that passengers hire to take them between locations of their choice, the fare being calculated with a taximeter; a taxi or cab 

verb
  • To travel by taxicab. 

How often have the words driver's compartment and taxicab occurred in a corpus of books? (source: Google Ngram Viewer )