why do i hear fiffy pence peice, but not for other demominations

[rosyherb]

i only ever seem to hear people say fifty pence peice, but not others a 5p, pound coin, etc. Is it me? (play nice) or is there a reason for it?

[rosyherb]

cheers, i'm from 'up north, living down south - south west, and generally only hear the term piece for the 50p. Rosy xx