groom vs straighten up

groom

verb
  • To care for (horses or other animals) by brushing and cleaning them. 

  • To attempt to gain the trust of (somebody, especially a minor) with the intention of subjecting them to abusive or exploitative behaviour such as sexual abuse or human trafficking. 

  • In agile software development, to review and prioritize the items in the development backlog. 

  • To attend to one's appearance and clothing. 

  • To prepare (someone) for an event 

  • To prepare (a ski slope) for skiers by packing down the snow. 

  • To prepare (someone) for election or appointment. 

noun
  • A person who looks after horses. 

  • A brushing or cleaning, as of a dog or horse. 

  • A man who is about to marry. 

  • One of several officers of the English royal household, chiefly in the lord chamberlain's department. 

straighten up

verb
  • to tidy; tidy up 

  • to start living a reformed life 

  • to sit up straight, to stop hunching. 

  • to steer straight 

  • to deal with; put in order 

  • To become straight, or straighter 

  • To clarify 

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