Cadence varies by industry and audience. Generally: 1-3 broadcasts per week for content businesses, 1-2 for B2B, 2-5 for DTC.
Weekly or more. 2-5/week for active brands is normal.
Monthly newsletter + occasional product update. Don't overdo.
Weekly or biweekly. Your subscribers signed up for regular content.
Gradually increase frequency and watch unsubscribe/spam rate.