I am confident to my plan vs I am confident of my plan

Some examples from the web:

• I'm pretty confident about my plans.
• I'm pretty confident about my plans.
• You're very confident in your plans.
• You're very confident in your plans.
• With the proper plans in place, I am confident the relocation effort can be a smooth one.
• I am confident, therefore, that we can reach a peaceful resolution.
• Well, I am confident that Captain Gregson and Detective Bell can handle the transition neatly.
• I am confident you'll want to grant the Lieutenant Governor's request.
• I am confident that those issues will be resolved by June.
• Me neither, but I am confident.
• I am confident that tomorrow Parliament will endorse it by an overwhelming majority.
• But I am confident we've got our man.
• I am confident that I can count on Parliament's continued support in pursuing these efforts.
• I am confident that you will succeed in convincing the Council too.
• Nonetheless, I am confident of a positive outcome.
• I am confident that the European Parliament will provide us with the necessary support in these endeavours.
• And I am confident in that screening method.
• I am confident we will reach solutions that command large majority, obliging Council and Commission to follow the path set down by Parliament.
• I am confident the ship and her crew will soon return to service.
• I am confident that we will find a solution.

Some examples from the web:

• I'm pretty confident about my plans.
• I'm pretty confident about my plans.
• Nonetheless, I am confident of a positive outcome.
• I am confident of the Hungarian Presidency's support on this matter.
• You're very confident in your plans.
• You're very confident in your plans.
• With the proper plans in place, I am confident the relocation effort can be a smooth one.
• Mr President of the Commission, I personally am confident of your success.
• I am confident of a positive vote in this area, that is to say in the fisheries area as a whole, for I believe that only this will constitute an expression of our common political will.
• I, for one, am confident of your support in achieving this objective.
• I am confident, therefore, that we can reach a peaceful resolution.
• Well, I am confident that Captain Gregson and Detective Bell can handle the transition neatly.
• I am confident you'll want to grant the Lieutenant Governor's request.
• I am confident that those issues will be resolved by June.
• Me neither, but I am confident.
• I am confident that tomorrow Parliament will endorse it by an overwhelming majority.
• But I am confident we've got our man.
• I am confident that I can count on Parliament's continued support in pursuing these efforts.
• I am confident that you will succeed in convincing the Council too.
• I am confident that the European Parliament will provide us with the necessary support in these endeavours.