Object.freeze() seems like a transitional convenience method to move towards using const in ES6.
Are there cases where both take their place in the cod
const and Object.freeze are two completely different things.
const applies to bindings ("variables"). It creates an immutable binding, i.e. you cannot assign a new value to the binding.
Object.freeze works on values, and more specifically, object values. It makes an object immutable, i.e. you cannot change its properties.