dastard vs knave

dastard

noun
  • A malicious coward; a dishonorable sneak. 

adj
  • Meanly shrinking from danger, cowardly, dastardly. 

verb
  • To dastardize. 

knave

noun
  • A tricky, deceitful fellow; a dishonest person. 

  • A playing card marked with the figure of a servant or soldier; a jack. 

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