offbeat vs subnormal

offbeat

noun
  • An unconventional person, someone who does not follow the beat, who chooses not to conform. 

  • The beats not normally accented in a measure. 

adj
  • Unusual; unconventional; not ordinary. 

subnormal

noun
  • A person whose abilities are less than normal. 

  • That part of the axis of a curved line which is intercepted between the ordinate and the normal. 

adj
  • denormal 

  • Less than normal. 

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