How Many Data/values per second are transferred to GUI from the EVM430-fr6043?

Hi, I want to know how much data/values are  transferred to the GUI from the EVM in one second? The data includes DTOF, ATOF,VFR. Can This data transfer increased/decreased in the code?

Also, I have one more question. I'm designing an ultrasonic Spirometer and I realized that when I force exhale and inhale in the pipe , the peak Volume Flow Rate comes to only  around maximum 1 Liters/Second.

However , When I force inhale/exhale in a diagnostic spirometer the peak VFR comes 7-8 Liters/Second. Why the VFR is low in the pipe design?

Does the Gas speed depends on the pipe diameter? I have used the same pipe design as shown with the EVM.