split up vs withhold

split up

verb
  • separate, disassociate, cause to come apart. 

  • Cease to be together, break apart from the group. 

adj
  • Divided or separated. 

withhold

verb
  • To stay back. 

  • To keep (a physical object that one has obtained) to oneself rather than giving it back to its owner. 

  • To keep (information, assent etc) to oneself rather than revealing it. 

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