It depends on your local rain and how dry the soil is. What is your current set up? Please provide more details

We would not expect you need to water more than once per day. It is likely enough to do it twice a week

" In addition to proper watering, use mulch and provide well-drained soil, because these can also help to regulate the moisture delivered to the plants during the growing season. Providing peppers with adequate water is essential from the moment the plants flower until the harvest. Deeply water the plants with 1 inch of water per week, and adjust the amount or frequency during hot, dry periods, after rainfall or if your soil is sandy and drains fast. Instead of flooding the soil with water when it's dry, keep it evenly moist. Drip irrigation is ideal for growing peppers, because it's economical, less labor intensive and delivers the water at the plant's roots without wetting the foliage and possibly triggering diseases."

"Watering peppers too much or not enough can stress the plant and affect your yield. Overwatering the plants, for instance, might trigger standing water. This can lead to sunburned fruit and might cause the leaves to drop. Additionally, the excess water dilutes the nutrients in the soil, which also affects the plant's growth. If you neglect to water pepper plants, they might not set fruit and can wilt or their blossoms and buds might drop."

text from https://homeguides.sfgate.com/need-wa...

You should try water into the base of the plant, where it touches the soil. This avoids getting the leaves wet and spreading diseases.

Good luck