What is the origin of the idiom "new lease of life" and when to use it?

The phrase "new lease of life" does not have a specific origin, but it is derived from the legal concept of a lease, which refers to a contract granting temporary possession or use of a property. In this context, "lease" is used metaphorically to represent a period of time or opportunity for a fresh start or improved circumstances. It is used to describe a situation where someone is given another chance or opportunity to improve their health, energy levels, or overall outlook on life.