hardheaded vs sugarcoated

hardheaded

adj
  • Realistic; pragmatic. 

  • Stubborn; wilful. 

sugarcoated

adj
  • Made superficially more attractive, possibly to cover up faults. 

  • Coated with sugar. 

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