We look at the division of 90911648 by 858 
The aim is to understand the frequency of 858 in 90911648.

On to step 1:
858 can be fit into 9 0 times, resulting in 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.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 858

On to step 2:
858 goes into 90 0 times with a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Include the next digit (9) from the dividend after 90, then repeat: 909 / 858

Advancing to step 3:
When dividing 909 by 858, we get 1 with a remainder of 51.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 858 from 909 to get 51.
Append the next digit (1) from the dividend to 51 and continue with: 511 / 858

Moving on to step 4:
When dividing 511 by 858, we get 0 with a remainder of 511.
The next digit of our result is 0. 
Result so far: 10.0
Subtracting 0 from 511 leaves us with 511.
Bring next digit (1) of the dividend behind the 511 and repeat the process: 5111 / 858

Step 5:
858 can be fit into 5111 5 times, resulting in a remainder of 821.
The next digit of our result is 5. 
Result so far: 105.0
Subtracting 4290 from 5111 leaves us with 821.
Grab the next digit (6) from the dividend, add it to 821, then carry on: 8216 / 858

Going ahead to step 6:
The number 858 fits into 8216 9 times, leaving a remainder of 494.
Use 9 as the next digit of our solution. 
Result so far: 1059.0
The remainder is 494 after subtracting 7722 from 8216.
Grab the next digit (4) from the dividend, add it to 494, then carry on: 4944 / 858

Going ahead to step 7:
The number 858 fits into 4944 5 times, leaving a remainder of 654.
Put 5 as the next digit of the answer. 
Result so far: 10595.0
If we subtract 4290 from 4944, we get 654.
Grab the next digit (8) from the dividend, add it to 654, then carry on: 6548 / 858

On to step 8:
When dividing 6548 by 858, we get 7 with a remainder of 542.
The number 7 becomes the next digit in our result. 
Result so far: 105957.0
If we take 6006 away from 6548, we end up with 542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5420, and continue the process.

On to step 9:
When dividing 5420 by 858, we get 6 with a remainder of 272.
The next digit of our result is 6. 
Result so far: 105957.6
The remainder is 272 after subtracting 5148 from 5420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Going ahead to step 10:
The number 858 fits into 2720 3 times, leaving a remainder of 146.
Record the quotient 3 as the next digit in the result. 
Result so far: 105957.63
Subtracting 2574 from 2720 leaves us with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Moving on to step 11:
1460 divided by 858 is 1 with a remainder of 602.
Record the quotient 1 as the next digit in the result. 
Result so far: 105957.631
If we subtract 858 from 1460, we get 602.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6020, and continue the process.

Step 12:
858 goes into 6020 7 times with a remainder of 14.
The number 7 becomes the next digit in our result. 
Result so far: 105957.6317
Subtracting 6006 from 6020 leaves us 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.

On to step 13:
140 divided by 858 is 0 with a remainder of 140.
Record the quotient 0 as the next digit in the result. 
Result so far: 105957.6317
Subtract 0 from 140 to get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Let's proceed to step 14:
858 goes into 1400 1 times with a remainder of 542.
Use 1 as the next digit of our solution. 
Result so far: 105957.631701
Deduct 858 from 1400 and we're left with 542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5420, and continue the process.

Moving on to step 15:
858 can be fit into 5420 6 times, resulting in a remainder of 272.
The next digit of our result is 6. 
Result so far: 105957.6317016
Deduct 5148 from 5420 and we're left with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Let's proceed to step 16:
When dividing 2720 by 858, we get 3 with a remainder of 146.
Put 3 as the next digit of the answer. 
Result so far: 105957.63170163
Subtract 2574 from 2720 to get 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

The quotient of the division is 105957.63170163, and the remainder is 1.46e-07.