combinative vs synergetic

combinative

adj
  • Of, pertaining to, or resulting from combination. 

  • Serving, tending, or able to combine. 

synergetic

adj
  • Relating to synergy; synergistic. 

  • Relating to synergetics. 

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