According to the USPSTF, annual BP screening should be done annually if the patient is over 40 or if the patient is over 18 with risk factors for hypertension.
"The USPSTF recommends annual screening for adults aged 40 years or older and for those who are at increased risk for high blood pressure. Persons at increased risk include those who have high-normal blood pressure (130 to 139/85 to 89 mm Hg), those who are overweight or obese, and African Americans. Adults aged 18 to 39 years with normal blood pressure (<130/85 mm Hg) who do not have other risk factors should be rescreened every 3 to 5 years."
https://www.uspreventiveservicestaskforce.org/uspstf/recommendation/high-blood-pressure-in-adults-screening-monitoring-october-2015#:~:text=The%20USPSTF%20recommends%20screening%20for,see%20the%20Clinical%20Considerations%20section).
recommendation is out of date