centuplet vs hundredweight

centuplet

noun
  • Synonym of hundred: A group of 100. 

  • One of a group of 100, particularly one of 100 babies born at the same time, from the same egg, or from the same DNA. 

hundredweight

noun
  • Various units of ancient measurement systems consisting of 100 units usually translated as "pounds". 

  • A unit of measurement containing 112 avoirdupois pounds (8 st or 51 kg). 

  • Synonym of quintal, a unit of measurement containing various amounts depending on the objects weighed. 

  • A unit of measurement containing 100 avoirdupois pounds (45.5 kg). 

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