auto vs three-wheeler

auto

noun
  • An autorickshaw. 

  • An automobile. 

  • A setting for automatic operation. 

  • A car with an automatic gearbox / transmission. 

  • An automatic gearbox / transmission. 

three-wheeler

noun
  • An autorickshaw, tuk-tuk, trishaw. 

  • A car, cycle or motorbike having three wheels. 

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