estate vs operating system

estate

noun
  • A station wagon; a car with a tailgate (or liftgate) and storage space to the rear of the seating which is coterminous with the passenger compartment (and often extensible into that compartment via folding or removable seating). 

  • An organization's collective information technology resources. 

  • An (especially extensive) area of land, under a single ownership. 

  • The collective property and liabilities of someone, especially a deceased person. 

  • The nature and extent of a person's interest in, or ownership of, land. 

  • A housing estate. 

  • The landed property owned or controlled by a government or a department of government. 

  • A major social class or order of persons regarded collectively as part of the body politic of the country and formerly possessing distinct political rights (Estates of the realm). 

adj
  • Previously owned; secondhand. 

operating system

noun
  • Software for controlling the allocation and use of various hardware resources (memory, CPU time, disk space, input and output devices) to tasks and remote terminals. 

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