round up vs sparse

round up

verb
  • To gather (cattle) together by riding around them. 

  • To round (a number) to the smallest integer that is not less than it, or to some other greater value, especially a whole number of hundreds, thousands, etc. 

  • To arrest or detain a group of people without individualized suspicion or cause, often as a form of targeted persecution. 

  • To collect or gather (something) together. 

sparse

adj
  • Having few nonzero elements 

  • Having widely spaced intervals. 

  • Not dense; meager; scanty 

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