triplets vs triplex

triplets

triplex

noun
  • A building with three apartments or divisions. 

  • A dwelling unit with three floors. 

  • Triple time. 

  • A throwing motion where three balls are thrown with one hand at the same time. 

verb
  • To make triplex. 

adj
  • Having three units, divisions, suites, apartments 

  • Having three floors 

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