Thanks Jon for the response, certainly appreciate it, makes sense indeed.
Great question, recently the National Institute of Health has come out and said that unless an individual has a higher than normal risk of developing heart disease, once a year is sufficient. If you have two or more of these risk factors or already have heart disease you may want to go to 6 months;
High Cholesterol
High BP
Over weight
Smoking
Family history
This is a question you should discuss with your doctor as they know your history and can give you the best answer for you.
Hope this helps,
Jon