laggard vs straggler

laggard

noun
  • One who lags behind; one who takes more time than is necessary or than the others in a group. 

adj
  • Lagging behind; taking more time than the others in a group. 

  • Not growing as quickly as the rest of the flock or herd. 

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 laggard and straggler occurred in a corpus of books? (source: Google Ngram Viewer )