call assignment in a sentence

1. But a whistle-blower has leaked documents about the association's phone-call assignments and the " targeting " of HMO executives and the insurance industry as one of its " natural areas ."
2. After the September 11, 2001, the Marine Corps began rotating standard infantry battalions such as 3rd Battalion 8th Marines ( 3 / 8 ) through 6 month on-call assignments as the designated " Anti Terrorism Battalion " to meet short term / no-notice mission requirements.
3. It's difficult to find call assignment in a sentence.