A long time a go / Long ago.
Can I use "A long time a go" / "Long ago" interchangably for this context?

If it were so easy to catch a thief, the police would have caught them a long time ago / long ago.

If I knew that would happen, I would have gone there a long time ago / long ago.

Thanks.

Question

A long time a go / Long ago.
Can I use "A long time a go" / "Long ago" interchangably for this context?

If it were so easy to catch a thief, the police would have caught them a long time ago / long ago.

If I knew that would happen, I would have gone there a long time ago / long ago.

Thanks.

Answer

Both versions are good in both cases

Answer

Yes, those are interchangeable in any context.