beetroot vs clear up

beetroot

verb
  • To turn a bright red or purple colour. 

noun
  • A normally deep-red-coloured root vegetable usually cooked or pickled before eating; Synonym of beet. 

  • The edible part of the root of a beet plant, raw or prepared. 

clear up

verb
  • To pot all of the remaining balls in a single turn. 

  • To depart or disappear. 

  • To clarify, to correct a misconception. 

  • To clean up. 

  • To become free of certain blemishes. 

  • Of stormy weather, to dissipate, to become calm. 

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