approve vs growl

approve

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

  • 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. 

growl

verb
  • To express (something) by growling. 

  • To play a wind instrument in a way that produces a low-pitched rumbling sound. 

  • To utter a deep guttural sound, as an angry animal; to give forth an angry, grumbling sound. 

  • Of a wind instrument: to produce a low-pitched rumbling sound. 

  • To send a user a message via the Growl software library. 

noun
  • A similar sound made by a human. 

  • The rumbling sound made by a human's hungry stomach. 

  • An aggressive grumbling. 

  • A deep, rumbling, threatening sound made in the throat by an animal. 

  • A low-pitched rumbling sound produced with a wind instrument. 

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