Convenient is an adjective, so you can't say with convenient. Even the noun form, 'with convenience' (while grammatically correct) is not a phrase one hears in English. Example: Online shopping is convenient.[ adjective] The store was located conveniently [ adverb] across the road "We can leave at your earliest convenience, [ noun] " said the servant to the King.

What's the full sentence?

convenient = adjective convenience = noun For more information check any good dictionary.