drawing room vs morning room

drawing room

noun
  • A private room on a railroad sleeping car. 

  • A multifunctional room that can be used for any purpose in a palace or castle. 

  • A levée where ladies are presented at court or to society. 

  • A room where engineers draw up plans and patterns. 

morning room

noun
  • A sitting-room in a big house, usually in the past, where people stayed in daylight only. 

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