Doctor hasn't told me how often. I've mostly been taking it each night. I think it's a medication issue -- my bp has spiked since the doctor changed the dosage on one of my meds. I've got an appointment with him on Thursday, so I'll discuss it then. I actually got the cuff because it's also got a heart rate monitor, and I'm supposed to be checking that when I feel like my heart is racing or clicking (which it has been doing lately, which I'm also blaming on the meds.)
Mostly, giving me something like a blood pressure cuff that'll give me immediate data is just dangerous. I get way too "What's my blood pressure now? ... Huh, I wonder what it is now..."