Top 5 largest results from list

I have a list of monthly error types an employee can be written up for. There are several error types (there are about 40 types). These do not change the number/type is static.See below what I am calling Chart one...

The amount of errors per month do change. I need to be able to add a section to a report displaying what the top 5 error types were number wise for each month.

I tried using a "large function" which works great to tell me the amount of worst error types for month (for example it looks through the error list and returns these numbers): 33,28,18,14,14. This data is displayed in what I am calling Chart 2 below. So for this example month one error type was reported 33 times, the next worst was 28 reports for another error type etc.

I then tried to use a VLookup on the results of the Large function (i.e. find in list of ~40 errors the number 30 and return the name of error type listed next to it) but there is a problem ..like the above month there are often duplicate numbers (there were 2 error types that both received 14 reports) for differing error types.Any ideas? Below is example of what I have on report page.

Chart 1
Error Type column,Amount column,%Rank column
ErrorA,x,x
ErrorB,x,x,

etc.

Chart 2
Amount column, Error Type
33, Error A
28, Error G
18, Error D
14, N/A
14,N/A