I'm not sure what a "contract at large" refers to. But, a frustrated contract (more typically called a contract with a "frustration of purpose") generally refers to a contract that becomes impossible or impractical to perform through no fault of the party which alleges the contract has been frustrated. So, for a contract's purpose to be considered "frustrated", an event must typically occur which essentially results in a situation where it can't be performed, as expected at the time the contract was entered into.
Here are some resources that go into great detail on the subject of contractual frustration:
(1) Frustrating Purpose in a Contract(2) Frustration of Purpose Example: Everything You Need to Know(3) What’s A Frustrated Contract?