Vibrations: Eigen Frequency Analysis

I understand that Eigenvalue=(Eigenfrequency)^2 , where eigenfrequency is is in Rad/second i.e angular velocity. To get cyclic frequency we divide eigenfrequency by 2 PI i.e. f (Hz)= eigenfrequency/2 PI .

Question1: What are the numbers COMSOL gives in Eigen frequency Analysis? are they Eigen values , Eigen Frequencies or cyclic frequency in Hz ?

Question2: How do I get Nondimensional Frequency of a plate using COMSOL?