pain in the bum vs pimple

pain in the bum

noun
  • Someone or something very annoying. 

pimple

noun
  • An annoying person. 

  • Scotch (whisky) 

  • An inflamed (raised and colored) spot on the surface of the skin that is usually painful and fills with pus. 

verb
  • To develop pimples 

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