We're dividing 71550109 by 558 
The aim is to understand the frequency of 558 in 71550109.

Step 1:
558 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 558

Moving on to step 2:
558 goes into 71 0 times with a remainder of 71.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 71 after subtracting 0 from 71.
Take the next digit (5) from the dividend and append it to 71, then repeat: 715 / 558

Advancing to step 3:
558 can be fit into 715 1 times, resulting in a remainder of 157.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 558 from 715 leaves us with 157.
Take the next digit (5) from the dividend and append it to 157, then repeat: 1575 / 558

Moving on to step 4:
1575 divided by 558 is 2 with a remainder of 459.
The next digit of our result is 2. 
Result so far: 12.0
The remainder is 459 after subtracting 1116 from 1575.
Fetch the next digit (0) from the dividend, attach it to 459 and continue: 4590 / 558

Going ahead to step 5:
The number 558 fits into 4590 8 times, leaving a remainder of 126.
Write down 8 as next digit of the result. 
Result so far: 128.0
Subtracting 4464 from 4590 leaves us with 126.
Fetch the next digit (1) from the dividend, attach it to 126 and continue: 1261 / 558

Advancing to step 6:
1261 divided by 558 is 2 with a remainder of 145.
Put 2 as the next digit of the answer. 
Result so far: 1282.0
Subtract 1116 from 1261 to get 145.
Grab the next digit (0) from the dividend, add it to 145, then carry on: 1450 / 558

Let's proceed to step 7:
The number 558 fits into 1450 2 times, leaving a remainder of 334.
Write down 2 as next digit of the result. 
Result so far: 12822.0
If we subtract 1116 from 1450, we get 334.
Include the next digit (9) from the dividend after 334, then repeat: 3349 / 558

Moving on to step 8:
558 can be fit into 3349 6 times, resulting in a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 128226.0
If we subtract 3348 from 3349, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
If we divide 10 by 558, we get 0 and a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 128226.0
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 10:
558 goes into 100 0 times with a remainder of 100.
Record the quotient 0 as the next digit in the result. 
Result so far: 128226.0
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final result is 128226.0 with a remainder of 0.1.