OK vs approve

OK

verb
  • To approve. 

  • To confirm by activating a button marked OK. 

adj
  • All right, acceptable, permitted. 

  • In good health or a good emotional state. 

  • Satisfactory, reasonably good; not exceptional. 

  • Satisfied (with); willing to accept a state of affairs. 

adv
  • Satisfactorily, sufficiently well. 

noun
  • Karaoke. 

  • Endorsement; approval. 

name
  • United States postal abbreviation for Oklahoma, a state of the United States of America. 

intj
  • Used to indicate acknowledgement or acceptance. 

  • Used to dismiss a dialog box or confirm a prompt. 

  • Used to introduce a sentence in order to draw attention to the importance of what is being said. 

  • Used in turn-taking, serving as a request to the speaker to grant the turn to the interrupter. 

approve

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

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

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