ponderosity vs poundage

ponderosity

noun
  • The quality of requiring extensive thought. 

poundage

verb
  • To collect, as poundage; to assess, or rate, by poundage. 

noun
  • a charge based on the value of something in pounds sterling 

  • a weight measured in pounds 

  • weight, especially body weight 

  • a charge based on the weight of something in pounds 

  • a fee charged for keeping an animal in a pound, or for its release 

  • the keeping of an animal in a pound 

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