grasp vs understanding

grasp

noun
  • Understanding. 

  • That which is accessible; that which is within one's reach or ability. 

  • Grip. 

verb
  • To take advantage of something, to seize, to jump at a chance. 

  • To grip; to take hold, particularly with the hand. 

  • To understand. 

understanding

noun
  • The act of one that understands or comprehends; comprehension; knowledge; discernment. 

  • Opinion, judgement or outlook. 

  • An informal contract; mutual agreement. 

  • A reconciliation of differences. 

  • Sympathy. 

  • Reason or intelligence, ability to grasp the full meaning of knowledge, ability to infer. 

adj
  • Showing compassion, tolerance, and forbearance. 

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