palliation vs respite

palliation

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

  • Extenuation; mitigation. 

respite

noun
  • A brief interval of rest or relief. 

  • The delay of appearance at court granted to a jury beyond the proper term. 

  • A short period of spoken dialogue in an otherwise sung-through musical. 

  • A reprieve, especially from a sentence of death. 

verb
  • To delay or postpone (an event). 

  • To allow (a person) extra time to fulfil some obligation. 

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