halt vs retard

halt

verb
  • To stand in doubt whether to proceed, or what to do; hesitate; be uncertain; linger; delay; mammer. 

  • To be lame, faulty, or defective, as in connection with ideas, or in measure, or in versification. 

  • To bring to a stop. 

  • To limp; move with a limping gait. 

  • To falter. 

  • To stop marching. 

  • To stop either temporarily or permanently. 

  • To cause to discontinue. 

  • To waver. 

noun
  • A minor railway station (usually unstaffed) in the United Kingdom. 

  • A cessation, either temporary or permanent. 

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 halt and retard occurred in a corpus of books? (source: Google Ngram Viewer )