retard vs shake up

retard

verb
  • To put off; to postpone. 

  • To decelerate; to slow down. 

  • To keep delaying; to continue to hinder; to prevent from progressing. 

noun
  • Retardation; delay. 

  • A slowing down of the tempo; a ritardando. 

  • A person or being who is extremely stupid or slow to learn. 

shake up

verb
  • To upset or distress (a person). 

  • To agitate by shaking. 

  • To reorganize, to make reforms in. 

  • To restore to its original shape by shaking. 

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