I know that the usual way is:

> 
> He calls me every Saturday.
> 
> 
> 

But I think "He is calling me every Saturday" must mean something. My assumption is that it can mean:

a) He spends every Saturday all day calling me.

b) He is calling me every Saturday for now. (it's going to end in the foreseeable future)

What is your take on it?

PS: I decided to add this question.

Let's imagine that the person calls every Saturday non-stop from 00.01 till 23.59 (I know it's almost impossible but it's not the point). Wouldn't it be the continuous? "He is calling me every Saturday".