intercourse vs quietude

intercourse

verb
  • To have sexual intercourse. 

noun
  • Dealings with people, including commerce and trade. 

  • Sexual intercourse usually involving humans. 

  • Dealings between countries. 

  • Communication, conversation. 

quietude

noun
  • tranquility 

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