Ski Wax How Often Do You Need To Sharpen And Wax Ski's ?

How often do you need to sharpen and wax ski's ? - ski wax

I sharpen my skis and waxing a few years ago for a great ski trip, and was canceled. This is was a few years, and I have not used, should I take before pressing the mountain again? or wax is gone, and refinement is never used.