economy vs luxury

economy

adv
  • In or via the part of a commercial passenger airplane reserved for those paying the lower standard fares. 

noun
  • The study of money, currency and trade, and the efficient use of resources. 

  • The system of production and distribution and consumption. The overall measure of a currency system; as the national economy. 

  • The part of a commercial passenger airplane or train reserved for those paying the lower standard fares; economy class. 

  • Frugal use of resources. 

  • The method of divine government of the world. (See w:Economy (religion).) 

adj
  • Cheap to run; using minimal resources; representing good value for money; economical. 

luxury

adj
  • very expensive 

  • not essential but desirable and enjoyable and indulgent. 

  • Pertaining to the top-end market segment for mass production mass market vehicles, above the premium market segment. 

noun
  • Very wealthy and comfortable surroundings. 

  • Something desirable but expensive. 

  • Something that is pleasant but not necessary in life. 

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