aberrant vs excentric

aberrant

adj
  • Differing from the norm. 

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

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

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

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

excentric

adj
  • One-sided; having the normally central portion not in the true center. 

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