amateur hour vs comedy of errors

amateur hour

noun
  • A situation or activity in which the participants show a lack of skill, sound judgment, or professionalism. 

  • An event, particularly on radio or television, showcasing the talents of amateur performers. 

comedy of errors

noun
  • A set of amusing or farcical events involving a series of awkward missteps or other mistakes. 

How often have the words amateur hour and comedy of errors occurred in a corpus of books? (source: Google Ngram Viewer )