grouch vs royal pain

grouch

noun
  • One who is grumpy or irritable. 

  • A complaint, a grumble, a fit of ill-humor. 

verb
  • To be grumpy or irritable; to complain. 

royal pain

noun
  • Someone or something which is very angering, annoying or disgusting. 

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