Transient flow analysis HELP

I need some solid works transient flow analysis help. I am trying to simulate human breathing by using a time table, created on excel. I followed similar instructions provided in this video https://www.youtube.com/watch?v=vi8I4-Rpwio&ab_channel=GoEngineer but using flow trajectory shows that I was getting continuous flow instead of flowing air in intervals. I put 0.0005 volume flow rate for the first 2 seconds and 0 for the next 2 seconds, but when i try to animate it using flow trajectory, it just shows continuous flow. 

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