economy vs longevity

economy

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

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).) 

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

longevity

noun
  • Duration over time; persistence. 

  • The quality of being long-lasting, especially of life. 

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