linger vs straggle

linger

verb
  • To stay or remain in a place or situation, especially as if unwilling to depart or not easily able to do so. 

  • To remain alive or existent although still proceeding toward death or extinction; to die gradually. 

  • To consider or contemplate for a period of time; to engage in analytic thinking or discussion. 

straggle

verb
  • To stray, rove, or wander from a normal course and others of its kind. 

  • To act in a disorderly and irregular way 

noun
  • An irregular, spread-out group. 

  • An outlier; something that has strayed beyond the normal limits. 

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