entertain vs have opinion

entertain

verb
  • To receive and take into consideration; to have a thought in mind. 

  • To have someone over at one's home for a party or visit. 

  • To amuse (someone); to engage the attention of agreeably. 

have opinion

verb
  • to think; to have or hold as an opinion 

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