conservatory vs greenhouse

conservatory

noun
  • A large greenhouse or hothouse for the display of plants 

  • A school of music or drama 

  • A storehouse. 

  • A glass-walled and -roofed room in a house 

adj
  • Relating to conservation. 

  • Having the quality of preserving from loss, decay, or injury. 

greenhouse

noun
  • A building used to grow plants, particularly one with large glass windows or plastic sheeting to trap heat from sunlight even in intemperate seasons or climates. 

  • A hot state in global climate. 

  • A structure that shields the operating table to protect against bacteria. 

verb
  • To place (plants) in a greenhouse. 

  • To nurture in order to promote growth. 

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