We look at the division of 605912 by 99 
The aim is to understand the frequency of 99 in 605912.

Step 1:
99 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 99

Let's proceed to step 2:
When dividing 60 by 99, we get 0 with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 60 leaves us with 60.
Fetch the next digit (5) from the dividend, attach it to 60 and continue: 605 / 99

Advancing to step 3:
If we divide 605 by 99, we get 6 and a remainder of 11.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 11 after subtracting 594 from 605.
Grab the next digit (9) from the dividend, add it to 11, then carry on: 119 / 99

On to step 4:
99 can be fit into 119 1 times, resulting in a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 61.0
If we take 99 away from 119, we end up with 20.
Take the next digit (1) from the dividend and append it to 20, then repeat: 201 / 99

Advancing to step 5:
When dividing 201 by 99, we get 2 with a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 612.0
If we take 198 away from 201, we end up with 3.
Fetch the next digit (2) from the dividend, attach it to 3 and continue: 32 / 99

Let's proceed to step 6:
When dividing 32 by 99, we get 0 with a remainder of 32.
The next digit of our result is 0. 
Result so far: 6120.0
If we subtract 0 from 32, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 7:
If we divide 320 by 99, we get 3 and a remainder of 23.
Put 3 as the next digit of the answer. 
Result so far: 6120.3
Subtracting 297 from 320 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 8:
The number 99 fits into 230 2 times, leaving a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 6120.32
If we subtract 198 from 230, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 9:
99 can be fit into 320 3 times, resulting in a remainder of 23.
The next digit of our result is 3. 
Result so far: 6120.323
If we take 297 away from 320, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 10:
If we divide 230 by 99, we get 2 and a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 6120.3232
The remainder is 32 after subtracting 198 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 11:
99 goes into 320 3 times with a remainder of 23.
The next digit of our result is 3. 
Result so far: 6120.32323
Subtracting 297 from 320 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 12:
If we divide 230 by 99, we get 2 and a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 6120.323232
If we take 198 away from 230, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 13:
When dividing 320 by 99, we get 3 with a remainder of 23.
Write down 3 as next digit of the result. 
Result so far: 6120.3232323
If we take 297 away from 320, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 14:
99 can be fit into 230 2 times, resulting in a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 6120.32323232
If we take 198 away from 230, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final outcome is 6120.32323232, with a leftover of 3.2e-08.