What is the difference between "share of the market" and "share of the customer?"

What will be an ideal response?

Share of the market refers to what percentage of all sales of a particular product/service your company gets. For example, you may sell 15% of all men's clothing in your town. Share of the customer refers to what percentage of the customer's spending do you get. Example, a customer buys 80% of all his clothing needs from you.