Псевдоним типа RelativeTimeKey

RelativeTimeKey:
    | "s"
    | "ss"
    | "m"
    | "mm"
    | "h"
    | "hh"
    | "d"
    | "dd"
    | "w"
    | "ww"
    | "M"
    | "MM"
    | "y"
    | "yy"