Segmenting your customers by buying frequency can be done in various ways, depending on your business model, product type, and customer behavior. A popular and straightforward approach is to use the RFM model, which stands for Recency, Frequency, and Monetary value. This model assigns a score to each customer based on their purchase history. You can then group customers into different segments based on their RFM scores. For example, high-value customers are those who have bought recently, frequently, and with high monetary value; they are your most loyal and profitable customers, so you should focus on retaining them and increasing their lifetime value. Low-value customers are those who have bought infrequently, with low monetary value, and a long time ago; they are your least loyal and profitable customers, so you should try to re-activate them or remove them from your list. Potential customers are those who have bought recently and with high monetary value but not frequently; they are your most promising customers, so you should encourage them to buy more often and become loyal customers. Lastly, lapsed customers are those who have bought frequently and with high monetary value but not recently; they are your most at-risk customers, so you should try to win them back and prevent them from defecting.