coaching vs priming

coaching

noun
  • The process by which someone is coached or tutored; instruction. 

  • The operation of horse-drawn coaches, especially as a business. 

  • Relating to horse-drawn stagecoaches, also to railway carriages (or coaches). 

priming

noun
  • The implicit memory effect in which exposure to a stimulus influences response to a subsequent stimulus. 

  • The powder or other combustible used to communicate fire to a charge of gunpowder, as in a firearm. 

  • The carrying over of water, with the steam, from the boiler, as into the cylinder. 

  • A substance used as a primer. 

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