We look at the division of 218400 by 17 
The aim is to understand the frequency of 17 in 218400.

Advancing to step 1:
When dividing 2 by 17, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 17

Let's proceed to step 2:
17 goes into 21 1 times with a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 17 away from 21, we end up with 4.
Fetch the next digit (8) from the dividend, attach it to 4 and continue: 48 / 17

Advancing to step 3:
48 divided by 17 is 2 with a remainder of 14.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Deduct 34 from 48 and we're left with 14.
Fetch the next digit (4) from the dividend, attach it to 14 and continue: 144 / 17

Moving on to step 4:
The number 17 fits into 144 8 times, leaving a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 128.0
The remainder is 8 after subtracting 136 from 144.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 17

Moving on to step 5:
17 can be fit into 80 4 times, resulting in a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 1284.0
If we subtract 68 from 80, we get 12.
Bring next digit (0) of the dividend behind the 12 and repeat the process: 120 / 17

Moving on to step 6:
If we divide 120 by 17, we get 7 and a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 12847.0
If we take 119 away from 120, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
17 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 12847.0
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
17 can be fit into 100 5 times, resulting in a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 12847.05
If we take 85 away from 100, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 9:
If we divide 150 by 17, we get 8 and a remainder of 14.
The next digit of our result is 8. 
Result so far: 12847.058
Subtracting 136 from 150 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 10:
140 divided by 17 is 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 12847.0588
If we take 136 away from 140, we end up 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.

After the division, we end up with 12847.0588 and a remainder of 4e-05.