The ideal frequency depends on the client segment:
Strategic accounts (top 5-10%): 2 to 4 touchpoints per year, like executive dinners, exclusive invitations and personal meetings.
Growth accounts (top 10-30%): 2 to 3 times a year, like a client day plus targeted sessions.
Base accounts (70%): 1 to 2 times a year, like a big client day and possibly a webinar.
More on segmentation in our article on client retention through events.