sluggard vs straggler

sluggard

noun
  • A person who is lazy, stupid, or idle by habit. 

  • A person slow to begin necessary work, a slothful person. 

  • A fearful or cowardly person, a poltroon. 

straggler

noun
  • A person who straggles, or departs from the direct or proper course, or from the company to which they belong. 

  • Something that stands alone or by itself. 

  • One who falls behind the rest, for example in a race. 

  • Something that shoots, or spreads out, beyond the rest, or too far; an exuberant growth. 

  • One who roams without any settled direction. 

  • A roving vagabond. 

  • A migratory animal found away from its usual range. 

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