concern vs plight

concern

noun
  • A worry; a sense that something may be wrong; an identification of a possible problem. 

  • The placement of interest or worry on a subject. 

  • The expression of solicitude, anxiety, or compassion toward a thing or person. 

  • That which affects one’s welfare or happiness. A matter of interest to someone. 

  • A business, firm or enterprise; a company. 

  • Any set of information that affects the code of a computer program. 

verb
  • To engage by feeling or sentiment; to interest. 

  • To relate or belong to; to have reference to or connection with; to affect the interest of; to be of importance to. 

  • To make somebody worried. 

plight

noun
  • An instance of danger or peril; a dangerous moment or situation. 

  • Blame; culpability; fault; wrong-doing; sin; crime. 

  • One's office; duty; charge. 

  • Responsibility for ensuing consequences; risk; danger; peril. 

  • A dire or unfortunate situation. 

verb
  • To promise (oneself) to someone, or to do something. 

  • Specifically, to pledge (one's troth etc.) as part of a marriage ceremony. 

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