Hopefully you can count on them for a long period of time. Quite frankly, not often do you give those players up..
If you count on someone or count upon them, you rely on them to support you or help you. Don't count on Lillian I can always count on you to cheer me up
If you count on something or count upon it, you expect it to happen and include it in your plans. The government thought it could count on the support of the trades unions