career vs retard

career

verb
  • To move rapidly straight ahead, especially in an uncontrolled way. 

noun
  • General course of action or conduct in life, or in a particular part of it. 

  • One's calling in life; a person's occupation; one's profession. 

  • A jouster's path during a joust. 

  • The flight of a hawk. 

adj
  • Synonym of serial (“doing something repeatedly or regularly as part of one's lifestyle or career”) 

retard

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

  • To put off; to postpone. 

  • To decelerate; to slow down. 

noun
  • Retardation; delay. 

  • A slowing down of the tempo; a ritardando. 

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

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