cussed vs pigheaded

cussed

adj

  • Ill-tempered, nasty, obstinate. 

adv

  • Very, cussedly, accursedly. 

pigheaded

adj

  • Obstinate and stubborn to the point of stupidity. 

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