National Rail make a rail card for two or more people that say only lasts 6 months.

Myself and my fiance currently buy the two together railcard, but it costs £30 a year, but we only use it when we buy our tickets at the train station and to show the conductors on the trains going to and coming back from visiting my fiance's family in the Northeast of England and we live in the Northwest. Neither of us can drive.
There needs to be more choice as not everyone needs a railcard that lasts for a year especially if the people who use the card only use it once in an entire year.