undergo vs withstand

undergo

verb
  • To suffer or endure; bear with. 

  • To experience; to pass through a phase. 

  • The project is undergoing great changes. 

withstand

verb
  • To resist or endure (something) successfully. 

  • To oppose (something) forcefully. 

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