The word infrastructure isn't new. But its common usage is.
When I turned thirteen, in 1960, my parents gave me a Websters's New World Dictionary of the American Language. It's as thick as the multiple subsequent editions of Webster's that we have laying around here.
An underlying base or foundation 1. The basic facilities needed for the functioning of a system. Websters II New Riverside Dictionary 1984
Between infrared and infrequence