This is confusing - I take it that you had skin cancer not oral cancer hence the dermatological examinations. In the case of oral cancer it makes no difference what staging it is. The practice guidelines for followup are:

visual and palpation exam every:

1-3 mos. year 1
2-4 mos. year 2
3-5 mos. year 3-5
6-12 mos. year 5>
Annual chest xray

For skin cancer the exam frequency is every 6-12 months for life.

You go to this link and find out the specific practice guidelines for skin cancer:
http://www.nccn.org/professionals/physician_gls/PDF/nmsc.pdf

George Harrison had oral cancer.