Fred,
Depends whether you are a Captain or F/O, as a current LTN based F/O I can say that I do very little nightstops. In the last 6 months I have been to Newcastle once for a few days & also been to Belfast around 3-4 times usually for a couple of nights at a time.
Generally we do few nightstops as we dont cover any other bases apart from NCL & BFS & I would estimate a couple of nightstops every few months.