illicitly - in a manner disapproved or not allowed by custom; He acted illegitimately when he increased the rent fourfold. illegitimately. lawfully, legitimately, licitly - in a manner acceptable to common custom; you cannot do this legitimately!.
You should check your blood pressure at home at least once a day, three to five times a week. Two to three measurements a day would be ideal, but at least one, at different times of the day, is okay. The morning blood pressure may be different than the afternoon blood pressure, which may be different than the evening blood pressure.
The devices measure the blood pressure over a one to two day period every 15 to 20 minutes during the day and every 30 to 60 minutes at night. This is more costly and not always available, though, so self-recorded home blood pressure measurements are a reasonable alternative.