consonance vs even steven

consonance

noun
  • Harmony; agreement; lack of discordance. 

  • The repetition of consonant sounds, but not vowels as in assonance. 

even steven

noun
  • harmony, balance; parity 

  • equity; equilibrium 

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 consonance and even steven occurred in a corpus of books? (source: Google Ngram Viewer )