give someone the boot vs oust

give someone the boot

verb
  • (idiomatic, Britain, informal) To fire, sack, or eject someone. 

  • Used other than figuratively or idiomatically: see give, the, boot. 

oust

verb
  • To expel; to remove. 

How often have the words give someone the boot and oust occurred in a corpus of books? (source: Google Ngram Viewer )