three-ply vs triplefold

three-ply

adj

  • Having three strands or layers 

noun

  • Yarn having three strands 

triplefold

adj

  • Synonym of threefold 

adv

  • Synonym of threefold 

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