cussed vs unkiddingly

cussed

adv

  • Very, cussedly, accursedly. 

adj

  • Ill-tempered, nasty, obstinate. 

unkiddingly

adv

  • Without kidding or joking; in all seriousness. 

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