round up vs scare up

round up

verb
  • To collect or gather (something) together. 

  • 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. 

scare up

verb
  • To find or procure while relying on chance to provide the means, especially something not easily found or procured. 

  • To frighten (an animal, especially a game animal) into appearing from cover. 

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