99395329 ÷ 858 
The aim is to understand the frequency of 858 in 99395329.

Moving on to step 1:
9 divided by 858 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 858

Let's proceed to step 2:
858 can be fit into 99 0 times, resulting in a remainder of 99.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 99, we end up with 99.
Grab the next digit (3) from the dividend, add it to 99, then carry on: 993 / 858

Step 3:
858 goes into 993 1 times with a remainder of 135.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 858 from 993 to get 135.
Fetch the next digit (9) from the dividend, attach it to 135 and continue: 1359 / 858

On to step 4:
1359 divided by 858 is 1 with a remainder of 501.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
The remainder is 501 after subtracting 858 from 1359.
Take the next digit (5) from the dividend and append it to 501, then repeat: 5015 / 858

Going ahead to step 5:
The number 858 fits into 5015 5 times, leaving a remainder of 725.
Record the quotient 5 as the next digit in the result. 
Result so far: 115.0
Subtract 4290 from 5015 to get 725.
Fetch the next digit (3) from the dividend, attach it to 725 and continue: 7253 / 858

Advancing to step 6:
If we divide 7253 by 858, we get 8 and a remainder of 389.
The next digit of our result is 8. 
Result so far: 1158.0
Subtract 6864 from 7253 to get 389.
Grab the next digit (2) from the dividend, add it to 389, then carry on: 3892 / 858

Advancing to step 7:
When dividing 3892 by 858, we get 4 with a remainder of 460.
Use 4 as the next digit of our solution. 
Result so far: 11584.0
Subtracting 3432 from 3892 leaves us with 460.
Fetch the next digit (9) from the dividend, attach it to 460 and continue: 4609 / 858

Going ahead to step 8:
If we divide 4609 by 858, we get 5 and a remainder of 319.
The next digit of our result is 5. 
Result so far: 115845.0
Subtract 4290 from 4609 to get 319.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3190, and continue the process.

Moving on to step 9:
858 goes into 3190 3 times with a remainder of 616.
Use 3 as the next digit of our solution. 
Result so far: 115845.3
Subtract 2574 from 3190 to get 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Advancing to step 10:
When dividing 6160 by 858, we get 7 with a remainder of 154.
The next digit of our result is 7. 
Result so far: 115845.37
Deduct 6006 from 6160 and we're left with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Going ahead to step 11:
When dividing 1540 by 858, we get 1 with a remainder of 682.
Write down 1 as next digit of the result. 
Result so far: 115845.371
If we take 858 away from 1540, we end up with 682.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6820, and continue the process.

On to step 12:
When dividing 6820 by 858, we get 7 with a remainder of 814.
Write down 7 as next digit of the result. 
Result so far: 115845.3717
Subtracting 6006 from 6820 leaves us with 814.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8140, and continue the process.

Let's proceed to step 13:
When dividing 8140 by 858, we get 9 with a remainder of 418.
Use 9 as the next digit of our solution. 
Result so far: 115845.37179
Subtracting 7722 from 8140 leaves us with 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Moving on to step 14:
858 goes into 4180 4 times with a remainder of 748.
Write down 4 as next digit of the result. 
Result so far: 115845.371794
The remainder is 748 after subtracting 3432 from 4180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7480, and continue the process.

On to step 15:
The number 858 fits into 7480 8 times, leaving a remainder of 616.
Put 8 as the next digit of the answer. 
Result so far: 115845.3717948
Deduct 6864 from 7480 and we're left with 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Going ahead to step 16:
858 goes into 6160 7 times with a remainder of 154.
Record the quotient 7 as the next digit in the result. 
Result so far: 115845.37179487
If we take 6006 away from 6160, we end up with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

The final result is 115845.37179487 with a remainder of 1.54e-07.