We're dividing 216129 by 5 
The aim is to understand the frequency of 5 in 216129.

Step 1:
The number 5 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 5

Going ahead to step 2:
21 divided by 5 is 4 with a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 20 away from 21, we end up with 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 5

Step 3:
If we divide 16 by 5, we get 3 and a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
Subtracting 15 from 16 leaves us with 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 5

Moving on to step 4:
If we divide 11 by 5, we get 2 and a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 432.0
The remainder is 1 after subtracting 10 from 11.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 5

On to step 5:
12 divided by 5 is 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 4322.0
Subtract 10 from 12 to get 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 5

Let's proceed to step 6:
29 divided by 5 is 5 with a remainder of 4.
The next digit of our result is 5. 
Result so far: 43225.0
Deduct 25 from 29 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 7:
40 divided by 5 is 8 with a remainder of 0.
The next digit of our result is 8. 
Result so far: 43225.8
Deduct 40 from 40 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
If we divide 0 by 5, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 43225.8
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
If we divide 0 by 5, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 43225.8
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 43225.8 and a remainder of 0.0.