intersperse vs split up

intersperse

verb
  • To diversify by placing or inserting other things among something. 

  • To scatter or insert something into or among other things. 

  • To mix two things irregularly, placing things of one kind among things of other. 

split up

verb
  • separate, disassociate, cause to come apart. 

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

adj
  • Divided or separated. 

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