Compare a column of substring with another column of strings and get count
 

Below is the scenario. I have 2 columns. Column A has some article Ids (IS123, IS1234, etc.). Column X has Solutions provided to customer, where this article Id would be a reference (substring.)

I need the to compare each article Id (column A) with all solutions provided (Column X) and get the count of occurrences of each article Id in Column B.

Please Help!!

-Shanmu