Morning all........
I check at least four times a day. One fasting in the am and adjust R insulin based on that before I take my Lantus. I have breakfast of something. and then during the day. I always do a two hour post prandial testing. 30 minutes after you eat is not enough time to allow beta cells to fully discharge insulin in the small intestine where catabolism/metabolism begins.
Also almost every time I exercise I do a check and after exercise I do a check and before bed I do a check. I know thats more than four but on average .
Oh and when I am sick I am always checking at least every hour.
I used to be on oral meds but when they started to fail to control I began testing more.

julie