constraining vs energetic

constraining

noun
  • The act by which something is constrained. 

energetic

noun
  • Any material utilized for its release of energy, either as an explosive, propellant, or for pyrotechnic effects. 

adj
  • Characterised by force or vigour; full of energy; lively, vigorous. 

  • Possessing or pertaining to energy. 

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