apprehension vs worry

apprehension

noun
  • Anticipation, especially of unfavorable things such as dread or fear or the prospect of something unpleasant in the future. 

  • Opinion; conception; sentiment; idea. 

  • The faculty by which ideas are conceived or by which perceptions are grasped; understanding. 

  • The physical act of seizing or taking hold of (something); seizing. 

  • Perception; the act of understanding using one's intellect without affirming, denying, or passing any judgment 

  • The act of seizing or taking by legal process; arrest. 

worry

noun
  • A strong feeling of anxiety. 

  • An instance or cause of such a feeling. 

  • A person who causes worry. 

verb
  • To harass; to irritate or distress. 

  • To touch repeatedly, to fiddle with. 

  • To be troubled; to give way to mental anxiety or doubt. 

  • To seize or shake by the throat, especially of a dog or wolf. 

  • Disturb the peace of mind of; afflict with mental agitation or distress. 

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