cultivation vs grounding

cultivation

noun
  • Advancement or refinement in physical, intellectual, or moral condition 

  • The art or act of cultivating; improvement of land for or by agriculture 

  • The state of being cultivated or used for agriculture 

  • Devotion of time or attention to the improvement of (something) 

grounding

noun
  • Fundamental knowledge or background in a field or discipline. 

  • The collision of a ship with ground beneath the surface of the water. 

  • The absorption of energy through visualized "roots" descending from oneself into the ground, using chi. 

  • The act by which a child is grounded (forbidden from going out, using electronics, etc.). 

  • The return to a fully conscious state after a psychedelic experience. 

  • The interconnecting metal chassis/frame of a device, appliance, machine, or metal raceway via a designated conductor to earth at the service panel. It may be bare or covered, and does not carry current in normal operation. 

  • The background of embroidery, etc. 

  • The prevention of aircraft takeoff because of government action. 

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