You can measure the consistency of your email marketing efforts through various KPIs (Key Performance Indicators): - Open Rates: Consistent open rates indicate that your audience knows when to expect your emails and finds them valuable. - Click-Through Rates: Stable click-through rates suggest that your content is consistently engaging. - Conversion Rates: Consistent conversion rates show that your emails are effectively driving desired actions. - Unsubscribe Rates: Low and stable unsubscribe rates indicate that your audience is satisfied with your email frequency and content.