import .csv table

Hello everyone! I am new so i welcome any help.
I am trying to create a load collector type TABLED1 which I am then going to use in PBUSHT. So what my table actually represents is stiffness over frequency. But instead of entering the values manually, I want to import the values from an excel file. Problem is I don't know the exact format it needs to be in csv/txt file so what I get until know when I import is a table of 2 columns of zeros.

Any help please? Any example maybe?

Thank you in advance