clean potato vs satisfactory

clean potato

noun
  • A person of faultless character. 

  • Something that is excellent. 

satisfactory

noun
  • Somebody or something that meets requirements without exceeding them. 

  • The rating given to somebody or something that meets requirements without exceeding them. 

adj
  • Causing satisfaction; agreeable or pleasant; satisfying. 

  • Done to satisfaction; adequate or sufficient. 

  • Making atonement for a sin; expiatory. 

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