Health professionals suggest that everyone in their 60s and above should regularly check their blood pressure, Anne. It's just part of the daily routine for me.
I suspect that a large number of ABers will check their blood pressure daily, Anne.
If you only do it, say, once per month you wouldn't now whether an abnormally high figure was just a 'blip' or a sign of something serious. Monitoring BP daily is a better way of getting an overall picture of how things are.