Church bells do not mark the time by the hour. Town clock towers do that. They mark the seven christian devotions, eight if you count the Compline in the middle of the night - which is not, however, marked by a ringing of the bells.
They start with the Morning Offering, then moving to the Invocation, the Angelus (at noon), the Lord's Prayer, the Chaplet, the Memorare and then, finally, the Holy Rosary.
While not marking time by the hour, those devotions did mark, with the church bells, the work rhythm of the farmer's day in the field