palliation vs song and dance

palliation

noun
  • Extenuation; mitigation. 

  • The alleviation of a disease's symptoms without a cure; temporary relief. 

song and dance

noun
  • An excessively complex set of instructions. 

  • Used other than figuratively or idiomatically: see song, and, dance. 

  • An excessively elaborate story or excuse used to justify something. 

  • A display of unnecessary excitement or activity. 

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