usance vs using

usance

noun
  • Use. 

  • Customary or habitual usage. 

  • The interest paid on a borrowed sum, usury. 

  • The length of time permitted for the payment of a bill of exchange. 

using

noun
  • use; utilization 

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