86605076 divided by 558 
The aim is to understand the frequency of 558 in 86605076.

Let's proceed to step 1:
8 divided by 558 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 558

Going ahead to step 2:
When dividing 86 by 558, we get 0 with a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Fetch the next digit (6) from the dividend, attach it to 86 and continue: 866 / 558

Advancing to step 3:
The number 558 fits into 866 1 times, leaving a remainder of 308.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 558 from 866, we get 308.
Grab the next digit (0) from the dividend, add it to 308, then carry on: 3080 / 558

Going ahead to step 4:
When dividing 3080 by 558, we get 5 with a remainder of 290.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
The remainder is 290 after subtracting 2790 from 3080.
Fetch the next digit (5) from the dividend, attach it to 290 and continue: 2905 / 558

Moving on to step 5:
558 can be fit into 2905 5 times, resulting in a remainder of 115.
The number 5 becomes the next digit in our result. 
Result so far: 155.0
The remainder is 115 after subtracting 2790 from 2905.
Grab the next digit (0) from the dividend, add it to 115, then carry on: 1150 / 558

On to step 6:
558 goes into 1150 2 times with a remainder of 34.
Record the quotient 2 as the next digit in the result. 
Result so far: 1552.0
If we take 1116 away from 1150, we end up with 34.
Fetch the next digit (7) from the dividend, attach it to 34 and continue: 347 / 558

On to step 7:
The number 558 fits into 347 0 times, leaving a remainder of 347.
Record the quotient 0 as the next digit in the result. 
Result so far: 15520.0
Subtract 0 from 347 to get 347.
Append the next digit (6) from the dividend to 347 and continue with: 3476 / 558

Step 8:
3476 divided by 558 is 6 with a remainder of 128.
Use 6 as the next digit of our solution. 
Result so far: 155206.0
Subtracting 3348 from 3476 leaves us with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 9:
1280 divided by 558 is 2 with a remainder of 164.
The number 2 becomes the next digit in our result. 
Result so far: 155206.2
Deduct 1116 from 1280 and we're left with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Step 10:
1640 divided by 558 is 2 with a remainder of 524.
Record the quotient 2 as the next digit in the result. 
Result so far: 155206.22
Deduct 1116 from 1640 and we're left with 524.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5240, and continue the process.

The final outcome is 155206.22, with a leftover of 0.524.