20042758 ÷ 171 
The aim is to understand the frequency of 171 in 20042758.

Advancing to step 1:
171 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 171

Step 2:
When dividing 20 by 171, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Include the next digit (0) from the dividend after 20, then repeat: 200 / 171

Advancing to step 3:
The number 171 fits into 200 1 times, leaving a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 171 from 200 leaves us with 29.
Bring next digit (4) of the dividend behind the 29 and repeat the process: 294 / 171

Step 4:
171 can be fit into 294 1 times, resulting in a remainder of 123.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Deduct 171 from 294 and we're left with 123.
Bring next digit (2) of the dividend behind the 123 and repeat the process: 1232 / 171

Step 5:
1232 divided by 171 is 7 with a remainder of 35.
The number 7 becomes the next digit in our result. 
Result so far: 117.0
Subtract 1197 from 1232 to get 35.
Fetch the next digit (7) from the dividend, attach it to 35 and continue: 357 / 171

On to step 6:
357 divided by 171 is 2 with a remainder of 15.
The next digit of our result is 2. 
Result so far: 1172.0
The remainder is 15 after subtracting 342 from 357.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 171

Moving on to step 7:
171 goes into 155 0 times with a remainder of 155.
Write down 0 as next digit of the result. 
Result so far: 11720.0
The remainder is 155 after subtracting 0 from 155.
Take the next digit (8) from the dividend and append it to 155, then repeat: 1558 / 171

Going ahead to step 8:
1558 divided by 171 is 9 with a remainder of 19.
The number 9 becomes the next digit in our result. 
Result so far: 117209.0
If we subtract 1539 from 1558, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 9:
190 divided by 171 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 117209.1
Deduct 171 from 190 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 10:
If we divide 190 by 171, we get 1 and a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 117209.11
If we take 171 away from 190, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The final result is 117209.11 with a remainder of 0.019.