Bluebulb Projects' The Measure of Things presents:
140 is about one-and-one-tenth times the number of Union Stations in the United States
In other words, it's 1.04 times the count of Union Stations in the United States, and the count of Union Stations in the United States is 0.9620 times that amount.
(a.k.a. Union Terminal; a.k.a. Joint Station; a.k.a. Union Depot) (2016 figures) Typically shared between multiple railroad companies and stations, there are about 135 "Union Stations" in the United States. Of these, the busiest station is Chicago Union Station, which handles 120,000 passengers each year.