kiosk vs machine room

kiosk

noun
  • A small enclosed structure, often freestanding, open on one side or with a window, used as a booth to sell newspapers, cigarettes, etc. 

  • A public telephone booth. 

  • A Turkish garden pavilion. 

  • A similar unattended stand for the automatic dispensing of tickets, etc. 

machine room

noun
  • A limited-access room in a larger building dedicated to HVAC equipment and other machinery. 

  • A dedicated room for computers and related data processing equipment, often having a raised floor, abundant and dedicated air conditioning, and specialized power supply and fire suppression systems. 

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