approve vs concur

approve

verb
  • To consider worthy (to); to be pleased (with); to accept. 

  • To officially sanction; to ratify; to confirm; to set as satisfactory. 

  • To make profit of; to convert to one's own profit — said especially of waste or common land appropriated by the lord of the manor. 

  • To regard as good; to commend; to be pleased with; to think well of. 

concur

verb
  • To agree (in action or opinion); to have a common opinion; to coincide; to correspond. 

  • To converge. 

  • To meet in the same point; to combine or conjoin; to contribute or help towards a common object or effect. 

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