second string vs subnormal

second string

adj
  • Not as good; of a lower quality or condition. 

noun
  • A unit of players which is considered to have a secondary level of talent and which usually plays after the first string. 

subnormal

adj
  • Less than normal. 

  • denormal 

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. 

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