jeepney vs tro tro

jeepney

noun
  • A vehicle used as public transport in the Philippines, originally made from US military Jeeps left over from World War II and well known for their flamboyant decoration and crowded seating. 

tro tro

noun
  • A minibus operating as a share taxi in Ghana. 

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