castigator vs grouch

castigator

noun

  • One who castigates. 

grouch

noun

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

  • One who is grumpy or irritable. 

verb

  • To be grumpy or irritable; to complain. 

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