Re: Account review
Welcome to the AdWords community forum :-)
"Can anyone tell us how often Google reviews out account and stop our ads.
And how long for each review???"
Google can periodically perform reviews on accounts to check that they are in compliance with policies etc.
It is advised that the review process can last up to three business days and you can contact them if it has taken longer (see about the ad approval process below) Also, see "check your ad approval status" below to learn about different statuses and what they mean for your ads and account.
Please see the articles below, they cover the review process in detail-
When an advertiser does not adhere to policies, and ignores warnings to fix issues, account suspension will occur-
I hope this helps you