autistic vs on the spectrum

autistic

adj
  • Socially inept, self-absorbed, or stupid. 

  • Having autism, or pertaining to autism. 

  • Lame, uncool, stupid. 

  • Characterized by abnormal and unhealthy focus or persistence, and unhealthy hatred of opposition or criticism. 

noun
  • A person who has autism. 

on the spectrum

prep
  • Used other than figuratively or idiomatically: see on, spectrum. 

  • Having an autism spectrum disorder or exhibiting traits pertaining to or within the autism spectrum. 

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