Calculating Solution Frequency For the Geometry build in HFSS VERSION 13

Hello,
how can i calculate solution frequncy for my geometrical model that i want to analyzy using HFSS.

thanking

What is the model you are making if you do not know its working frequency as you always design your model for a particular frequency. But if it is cavity then use Eigen Mode solver of HFSS and resulting modes will give your resonant frequency of your model but even in that case you have to enter a guess in solution setup.