
    Design a function to validate ICU monitoring alert codes where each digit represents a vital sign threshold, ensuring that no threshold value (digit) appears more times than its numerical value to prevent system overload. For example, in a monitoring code, the digit 2 should not appear more than twice, the digit 3 should not appear more than three times, and so on. The function should return whether the given alert code is valid according to this frequency rule.
    

    
def validate(n):
    """
    Design a function to validate ICU monitoring alert codes where each digit represents a vital sign threshold, ensuring that no threshold value (digit) appears more times than its numerical value to prevent system overload. For example, in a monitoring code, the digit 2 should not appear more than twice, the digit 3 should not appear more than three times, and so on. The function should return whether the given alert code is valid according to this frequency rule.
    

    """
def validate(n):
    """
    Design a function to validate ICU monitoring alert codes where each digit represents a vital sign threshold, ensuring that no threshold value (digit) appears more times than its numerical value to prevent system overload. For example, in a monitoring code, the digit 2 should not appear more than twice, the digit 3 should not appear more than three times, and so on. The function should return whether the given alert code is valid according to this frequency rule.
    

    """
    for i in range(10):
        temp = n
        count = 0
        while temp:
            if temp % 10 == i:
                count += 1
            if count > i:
                return False
            temp //= 10
    return True