def count_digit_frequency(number):
    frequency = {}
    
    for digit in number:
        if digit.isdigit():
            if digit in frequency:
                frequency[digit] += 1
            else:
                frequency[digit] = 1
        else:
            print(f"Ignored invalid character: {digit}")
    
    return frequency

def display_frequency(frequency):
    print("Digit Frequency:")
    for digit, count in sorted(frequency.items()):
        print(f"Digit {digit}: {count} times")

def main():
    number = input("Enter a multi-digit number: ")
    frequency = count_digit_frequency(number)
    display_frequency(frequency)

if __name__ == "__main__":
    main()