jeepney vs matatu

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  • A vehicle used as public transport in the Philippines, originally made from US military Jeeps left over from World War II and well known for their flamboyant decoration and crowded seating. 

matatu

noun
  • A minivan used as a share taxi, especially one operating without a licence. 

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