Most trips on the same a/c?

Much as I love flying, one of my pet hates is getting to fly on an a/c I’ve already been on(especially the same a/c for outward/return flts on a trip). I’ve noticed that my record is 4 trips on an Air UK/KLMUK F100 G-UKFN(now PH-OFN?). Can anyonelse beat this?