auto vs bush taxi

auto

noun

  • An autorickshaw. 

  • An automobile. 

  • A setting for automatic operation. 

  • A car with an automatic gearbox / transmission. 

  • An automatic gearbox / transmission. 

bush taxi

noun

  • A share taxi in parts of Africa. 

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