In 1891 his age is a little out,but he doesn't strictly have an occupation,he is now "living on his own means".
His address throughout in this set just looks like transcription variants on the same address,and obviously very similar to "Carebout"
1891 Tyrbont Cadley,Penderry
(He is with his son from the 1851 census)
1881 Carbont LLangyfelach,Penderry Lower
1871 Carbont,Teer Pont Calley,Llangyfelach
1861 Caerbont,Llangyfelach
1851 Caerbont,Penderry
Regards
Roger