commissioning vs unemployment

commissioning

noun
  • The process of assuring that all systems and components of a major piece of equipment, a process, a building or similar are designed, installed and tested according to the operational requirements of the owner or final client. 

unemployment

noun
  • An instance or period of joblessness. 

  • The level of joblessness in an economy, often measured as a percentage of the workforce. 

  • The state of having no job; joblessness. 

  • A type of joblessness due to a particular economic mechanism. 

  • The phenomenon of joblessness in an economy. 

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