cab vs taxi cab

cab

verb
  • To travel by taxicab. 

noun
  • Shelter at the top of an air traffic control tower or fire lookout tower. 

  • Any of several four-wheeled carriages; a cabriolet. 

  • Compartment at the front of a truck or train for the driver. 

  • Synonym of taxi 

  • An arcade cabinet, the unit in which a video game is housed in a gaming arcade. 

  • A former Hebrew unit of volume, about equal to 1.3 L as a dry measure or 1.25 L as a liquid measure. 

taxi cab

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