858902 ÷ 99 
The aim is to understand the frequency of 99 in 858902.

On to step 1:
The number 99 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 99

Let's proceed to step 2:
85 divided by 99 is 0 with a remainder of 85.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 85 after subtracting 0 from 85.
Bring next digit (8) of the dividend behind the 85 and repeat the process: 858 / 99

Going ahead to step 3:
If we divide 858 by 99, we get 8 and a remainder of 66.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we take 792 away from 858, we end up with 66.
Bring next digit (9) of the dividend behind the 66 and repeat the process: 669 / 99

On to step 4:
When dividing 669 by 99, we get 6 with a remainder of 75.
The number 6 becomes the next digit in our result. 
Result so far: 86.0
If we take 594 away from 669, we end up with 75.
Bring next digit (0) of the dividend behind the 75 and repeat the process: 750 / 99

Going ahead to step 5:
99 goes into 750 7 times with a remainder of 57.
Write down 7 as next digit of the result. 
Result so far: 867.0
If we take 693 away from 750, we end up with 57.
Fetch the next digit (2) from the dividend, attach it to 57 and continue: 572 / 99

Moving on to step 6:
572 divided by 99 is 5 with a remainder of 77.
The next digit of our result is 5. 
Result so far: 8675.0
Deduct 495 from 572 and we're left with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Step 7:
If we divide 770 by 99, we get 7 and a remainder of 77.
The next digit of our result is 7. 
Result so far: 8675.7
If we subtract 693 from 770, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Let's proceed to step 8:
99 goes into 770 7 times with a remainder of 77.
The next digit of our result is 7. 
Result so far: 8675.77
If we subtract 693 from 770, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

The quotient of the division is 8675.77, and the remainder is 0.077.