equipoise vs even steven

equipoise

noun
  • A state of balance; equilibrium. 

  • A counterbalance. 

verb
  • To act or make to act as an equipoise. 

  • To cause to be or stay in equipoise. 

even steven

noun
  • equity; equilibrium 

  • harmony, balance; parity 

adv
  • evenly divided 

  • equally, evenly 

adj
  • being equal, as in score or account; tied 

  • exactly even, equal 

  • having nothing due, or no balance of debt on either side 

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