
    Write a function that validates a student's multi-module proficiency code, where each digit represents a skill level (1-9) across different learning modules, ensuring that the frequency of each skill level in the code does not exceed the level itself for balanced learning distribution. For example, in a code like "11223", level 1 appearing twice is valid since 1≥2, level 2 appearing twice is valid since 2≥2, and level 3 appearing once is valid since 3≥1.
    

    
def validate(n):
    """
    Write a function that validates a student's multi-module proficiency code, where each digit represents a skill level (1-9) across different learning modules, ensuring that the frequency of each skill level in the code does not exceed the level itself for balanced learning distribution. For example, in a code like "11223", level 1 appearing twice is valid since 1≥2, level 2 appearing twice is valid since 2≥2, and level 3 appearing once is valid since 3≥1.
    

    """
def validate(n):
    """
    Write a function that validates a student's multi-module proficiency code, where each digit represents a skill level (1-9) across different learning modules, ensuring that the frequency of each skill level in the code does not exceed the level itself for balanced learning distribution. For example, in a code like "11223", level 1 appearing twice is valid since 1≥2, level 2 appearing twice is valid since 2≥2, and level 3 appearing once is valid since 3≥1.
    

    """
    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