285830 ÷ 99 
The aim is to understand the frequency of 99 in 285830.

Step 1:
If we divide 2 by 99, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 99

Let's proceed to step 2:
99 goes into 28 0 times with a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 28 after subtracting 0 from 28.
Grab the next digit (5) from the dividend, add it to 28, then carry on: 285 / 99

On to step 3:
99 can be fit into 285 2 times, resulting in a remainder of 87.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 198 from 285, we get 87.
Append the next digit (8) from the dividend to 87 and continue with: 878 / 99

Moving on to step 4:
If we divide 878 by 99, we get 8 and a remainder of 86.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
If we subtract 792 from 878, we get 86.
Include the next digit (3) from the dividend after 86, then repeat: 863 / 99

Going ahead to step 5:
When dividing 863 by 99, we get 8 with a remainder of 71.
The number 8 becomes the next digit in our result. 
Result so far: 288.0
If we subtract 792 from 863, we get 71.
Append the next digit (0) from the dividend to 71 and continue with: 710 / 99

Let's proceed to step 6:
99 goes into 710 7 times with a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 2887.0
Subtracting 693 from 710 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
99 goes into 170 1 times with a remainder of 71.
The number 1 becomes the next digit in our result. 
Result so far: 2887.1
If we subtract 99 from 170, we get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 8:
99 can be fit into 710 7 times, resulting in a remainder of 17.
Use 7 as the next digit of our solution. 
Result so far: 2887.17
If we take 693 away from 710, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 9:
When dividing 170 by 99, we get 1 with a remainder of 71.
Write down 1 as next digit of the result. 
Result so far: 2887.171
Subtract 99 from 170 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 10:
99 can be fit into 710 7 times, resulting in a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 2887.1717
Subtracting 693 from 710 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 11:
When dividing 170 by 99, we get 1 with a remainder of 71.
Put 1 as the next digit of the answer. 
Result so far: 2887.17171
Subtracting 99 from 170 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 12:
710 divided by 99 is 7 with a remainder of 17.
The next digit of our result is 7. 
Result so far: 2887.171717
Subtract 693 from 710 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 13:
99 goes into 170 1 times with a remainder of 71.
Record the quotient 1 as the next digit in the result. 
Result so far: 2887.1717171
Deduct 99 from 170 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 14:
99 can be fit into 710 7 times, resulting in a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 2887.17171717
Subtracting 693 from 710 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The final outcome is 2887.17171717, with a leftover of 1.7e-08.