entertain vs spring for

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. 

spring for

verb
  • To pay for; to offer money. 

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