floundering vs subnormal

floundering

noun
  • The act of one who flounders; a clumsy struggle. 

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