Create Table Showing Which Columns in Another Table Contain Data

We are trying to clean up our overgrown, over-complicated CRM (dynamics) and I would like to have some empirical proof as to which fields are actually being utilized. I am therefore seeking to create a new table that would iterate over the columns of another table to make a new three column table containing column name, the number cells with data and the number of cells without data (null/blank).

This would allow me to visually see which fields are being utilized and which are not.

I have been able to do it within the same table by adding columns, but there are 100s of columns in each entity's table, so it's tedious to do it this way. Does anyone have thoughts on a way to achieve this? 

Thank you.