regulate vs straighten up

regulate

verb
  • To put or maintain in order. 

  • To control or direct according to rule, principle, or law. 

  • To adjust to a particular specification or requirement: regulate temperature. 

  • To dictate policy. 

  • To adjust (a mechanism) for accurate and proper functioning. 

straighten up

verb
  • to deal with; put in order 

  • to start living a reformed life 

  • to sit up straight, to stop hunching. 

  • to steer straight 

  • to tidy; tidy up 

  • To become straight, or straighter 

  • To clarify 

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