The frequency of the optimizations depends on whether you are just starting with the campaigns or you have been running them for a while, whether you are scaling or maintaining the results.
Generally, when you start, you wait for around a week or two to have the data you need. Then you start with daily tweaks to figure out the patterns and test out ideas. Then you go to weekly and biweekly. The good thing about SearchAdsHQ automation (alerts / send email notification only) is that you can have your account analyzed using all of these frequencies simultaneously and it will be easy for you to figure out how often changes happen in your case.
Remember that the more variable your market is, the more frequent optimizations will be in any case and the more data you have to analyze, the better optimization decisions you will make.