What is the frequency of sending marketing short messages so as not to arouse users' disgust?

I am in the field of CRM in the automobile industry, so I should be cautious in communicating with customers, and I don't recommend it too often. If you are in charge of luxury brand cars, you should pay more attention to this aspect. But on the whole, I suggest that your SMS frequency should be more than 90 days. Of course, there are some special days when you can send messages to wish you well. Like birthdays. There is actually no special fixed frequency here. I believe that as a manufacturer, there will be some strategic deployment in CRM. There must be some level of contact with customers here. You should pay more attention to the wholesale CRM strategy when you grasp your communication. Avoid causing too much communication and causing customers to be unhappy.