How frequently should you get your chimney inspected?

What do we look for when we are doing a chimney inspection?

1. Chimney Cap and Crown Defects:
2. Creosote:
3. Abandon or Hidden Ports:
4. Cleanliness and Maintenance:
5. Damages, Blockage, and Safety:
6. Dead End Flues
7. Re-Lining Required
8. Missing Clean out Doors and Fire hazards
9. Movement in Parts and Chimney
10. Rusts, Damages, or Support Defects
11. Unsealing, and Unlining