at stage or on stage

[david11]

It is the biggest stage to be at.

A sports told this when he asked about Olympics. My doubt is that shouldn't it be "on stage" instead of "at stage".
I checked BNC and it has only 70 entries for at stage but nearly 800 entries for on stage.

 

[5jj]

It depends on what sort of stage you are talking about.

 

[david11]

It depends on what sort of stage you are talking about.

He said in the context of Olympics. He is a tennis player. I can reasonably assume that he is saying Olympics is the biggest competition of all other competitions.(He is not a native speaker)

 

[Reemy]

As far as I know the meaning of at the biggest stage or at a certain stage differs from on stage. The first means at a certain point or level while the second refers to the arena where one plays a role. I hope I would be corrected if I am wrong.