The right phrase for 'more than more'

Question

I want a phrase to convey when something should be done more than enough to matter.

Is it correct to use the phrase 'more than more'?

Is it common in English literature?

Answer 1

Normally, you'd say more than once, but to express what you explained, you could say more than enough.

Certainly not more than more, as that's never used and sounds wrong.

Answer 2

More than more isn't a phrase I am familiar with, although if presented with it I could guess its intent. It's certainly not idiomatic English.

I think the phrase you are looking for is even more.

For example:

A: I have stirred this mix, can I stop?

B: No, you must stir more!

[5 minutes pass]

A: Can I stop now?

B: No! Stir even more!

The phrase can be used to emphatically indicate more without more having being previously used.

So this usage is also correct:

A: Have we walked far enough yet?

B: No, we must walk even more.