-record(valid_r_rule, {
    frequency :: automata@rrule@validator:frequency(),
    interval :: integer(),
    end_condition :: automata@rrule@validator:end_condition(),
    by_day :: gleam@option:option(list(automata@rrule@validator:weekday_specifier())),
    by_month :: gleam@option:option(list(integer())),
    by_month_day :: gleam@option:option(list(integer())),
    by_hour :: gleam@option:option(list(integer())),
    by_minute :: gleam@option:option(list(integer()))
}).