def cal_occurence(correspoding_text_number_list):
    """
    calcualte each occurence of a number in a list
    """
    di = dict()
    for i in correspoding_text_number_list:
        i = str(i)
        s = di.get(i, 0)
        if s == 0:
            di[i] = 1
        else:
            di[i] = di[i] + 1
    return di