Question frequency value

Hello!

I have a question, if I do a simulation of the frequency and the frequency shift is set to 8 Hz, Displacement of the first result is the value of 383.7 Hz, and the value at the last Displacement result is 6380 Hz. Is not to much the difference from 8Hz to 6380Hz or 6380 must be divided by 1000?

Thank you anticipate!

SolidworksSimulation