lowbrow vs subnormal

lowbrow

noun
  • Someone or something of low education or culture. 

  • An underground populist visual art movement that arose in the Los Angeles area in the late 1960s, inspired by comics, punk music, graffiti, etc. 

adj
  • Unsophisticated, not intended for an audience of intelligence, education or culture. 

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 lowbrow and subnormal occurred in a corpus of books? (source: Google Ngram Viewer )