retard vs stymie

retard

verb
  • To decelerate; to slow down. 

  • To put off; to postpone. 

  • 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. 

stymie

verb
  • To thwart or stump; to cause to fail or to leave hopelessly puzzled, confused, or stuck. 

  • To bring into the position of, or impede by, a stymie. 

noun
  • A situation where an opponent's ball is directly in the way of one's own ball and the hole, on the putting green (abolished 1952). 

  • An obstacle or obstruction. 

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