We look at the division of 123571 by 17 
The aim is to understand the frequency of 17 in 123571.

Moving on to step 1:
17 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 17

On to step 2:
If we divide 12 by 17, we get 0 and a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Grab the next digit (3) from the dividend, add it to 12, then carry on: 123 / 17

Moving on to step 3:
123 divided by 17 is 7 with a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtract 119 from 123 to get 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 17

Moving on to step 4:
17 goes into 45 2 times with a remainder of 11.
Record the quotient 2 as the next digit in the result. 
Result so far: 72.0
Deduct 34 from 45 and we're left with 11.
Grab the next digit (7) from the dividend, add it to 11, then carry on: 117 / 17

Step 5:
If we divide 117 by 17, we get 6 and a remainder of 15.
Use 6 as the next digit of our solution. 
Result so far: 726.0
Subtract 102 from 117 to get 15.
Fetch the next digit (1) from the dividend, attach it to 15 and continue: 151 / 17

Step 6:
17 can be fit into 151 8 times, resulting in a remainder of 15.
Use 8 as the next digit of our solution. 
Result so far: 7268.0
If we take 136 away from 151, 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.

Let's proceed to step 7:
If we divide 150 by 17, we get 8 and a remainder of 14.
Write down 8 as next digit of the result. 
Result so far: 7268.8
If we take 136 away from 150, we end up 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.

Let's proceed to step 8:
17 goes into 140 8 times with a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 7268.88
Deduct 136 from 140 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.

The final result is 7268.88 with a remainder of 0.004.