minicab vs taxi driver

minicab

noun

  • A small car used as a taxi (rather than a traditional black cab). 

  • An unlicensed taxi. 

verb

  • To drive a minicab. 

taxi driver

noun

  • A person who drives a taxicab. 

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