cycle rickshaw vs tuk-tuk

cycle rickshaw

noun
  • A rickshaw, mostly used as taxi, with two wheels in the back for the carriage and one wheel for steering in the front (or sometimes vice versa), propelled by the action of a driver’s feet upon pedals. 

tuk-tuk

noun
  • A motorized rickshaw, especially Southeast Asia or India. 

How often have the words cycle rickshaw and tuk-tuk occurred in a corpus of books? (source: Google Ngram Viewer )