sql - Need a query to count number of times a customer visits each region -


i have table has account_number field , region field, looks this:

account_number ... region  12345678          region1  12345667          region2

i need count number of times account number visits each region, output like:

account_number ... nbr_visits ... region  12345678             3          region 4  45678923             6          region 2

so, account number can occur multiple times if customer visits different regions in same month. isn't way have set up, 3rd party requiring format , i'm not sure best way go it. i'm using ms access 2010. 

select account_number,region,count(*) nbr_visits mytable   group account_number,region

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