laugh at vs send up

laugh at

verb
  • To scorn or tease; to evince contempt or pity for someone, usually contrasted with laugh with. 

  • Used other than figuratively or idiomatically: see laugh, at. 

send up

verb
  • To imitate someone or something for the purpose of satirical humour. 

  • To put in prison. 

  • Used other than figuratively or idiomatically: see send, up. 

How often have the words laugh at and send up occurred in a corpus of books? (source: Google Ngram Viewer )