fall sick vs regurgitate

fall sick

verb
  • To become ill; to fall ill. 

regurgitate

verb
  • To throw up or vomit; to eject what has previously been swallowed. 

  • To cough up from the gut to feed its young, as an animal or bird does. 

  • To repeat verbatim. 

  • To be thrown or poured back; to rush or surge back. 

noun
  • Something regurgitated; regurgitated matter. 

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