bring in vs flatten out

bring in

verb
  • To move something indoors, or into an area. 

  • To return a verdict in a court of law. 

  • To introduce a person or group of people to an organisation. 

  • To earn money for a company or for the family. 

  • To introduce a new rule, law, or system of organisation. 

flatten out

verb
  • To make flat (something rough, folded or bumpy). 

  • To win a fight, usually by punching someone until they are knocked over 

  • To become more even. 

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