constraining vs usual

constraining

noun
  • The act by which something is constrained. 

usual

adj
  • Most commonly occurring; typical. 

noun
  • A specific good or service (e.g. a drink) that someone typically orders. 

  • The typical state of something, or something that is typical. 

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