def collate_formed_groups(created_groups):
    """
        Collates the created groups into a usable summary
    
        collate_formed_groups(list(Group)) -> dict(int : int)
    """
    collated_result = {}
    
    for group in created_groups:
        if group.get_size() not in collated_result:
            collated_result[group.get_size()] = 1
        else:
            collated_result[group.get_size()] += 1

    return collated_result