aberrant vs abnormal

aberrant

noun
  • A person or object that deviates from the rest of a group. 

  • A group, individual, or structure that deviates from the usual or natural type, especially with an atypical chromosome number. 

adj
  • Differing from the norm. 

  • Straying from the right way; deviating from morality or truth. 

  • Deviating from the ordinary or natural type; exceptional; abnormal. 

abnormal

noun
  • A person or object that is not normal. 

adj
  • Of or pertaining to that which is irregular, in particular, behaviour that deviates from norms of social propriety or accepted standards of mental health. 

  • Not conforming to rule or system; deviating from the usual or normal type. 

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