milquetoast vs softheaded

milquetoast

adj
  • Meek, timid; lacking character or effectiveness. 

noun
  • A person of meek or timid disposition; a person who lacks character or effectiveness. 

softheaded

adj
  • Lacking sound judgment or resolve; stupid; weak-minded. 

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