Now that was very interesting - I had no idea frogs could live so long (as pets).
Correct me if I am wrong but I have read somewhere (can't find it again but when I do I will post the link) that some tree frogs may live up to 20 years in captivity depending on conditions. Although I presume it will be difficult to do for a beginner considering some of the problems associated with frogs, obesity and calcium deficiencies etc etc.