Brown How Common Are Blonde Hair And Brown Eyes Together?

How common are blonde hair and brown eyes together? - brown

Yesterday someone said they thought it would be cool to have blond hair and brown eyes, because that's really unusual. I think it is common when .... Just as the common Eyes (natural) blonde hair and brown together? Why some couples are more unique than others, like blue eyes and brown hair? There is no scientific reason? My mother has blonde hair and blue eyes, my father has brown hair, brown eyes.
So, what are your personal opinions about the blond hair and brown eyes? I find them very boring.