follow vs understand

follow

verb
  • To understand, to pay attention to. 

  • To walk in, as a road or course; to attend upon closely, as a profession or calling. 

  • To subscribe to see content from an account on a social media platform. 

  • To live one's life according to (religion, teachings, etc). 

  • To carry out (orders, instructions, etc.). 

  • To be a logical consequence of something. 

  • To watch, to keep track of (reports of) some event or person. 

  • To go or come after in a sequence. 

  • To go after; to pursue; to move behind in the same path or direction, especially with the intent of catching. 

noun
  • In billiards and similar games, a stroke causing a ball to follow another ball after hitting it. 

  • The act of following another user's online activity. 

understand

verb
  • To grasp a concept fully in one's mind, especially (of words, statements, art, etc.) to be aware of the meaning of and (of people) to be aware of the intent of. 

  • To believe, to think one grasps sufficiently despite potentially incomplete knowledge. 

  • To stand underneath, to support. 

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