Store values over time for calculation

Hello, i want to calculate level difference from a container over time to calculate the flow.
What is the best way to store the measurement value from the niveau sensor for about 1 minute to calculate the delta level? I dont want to store one value every minute. I want to use the value one minute ago everytime for calculation. Is there any prefabricated block in functional designer? In Master System we used a MOVE for short time spans and used the cycle time of the function. But for longer times span there must be an other solution. I hope you know what i mean and someone can help me ...