Let's divide 304840 by 99
The aim is to understand the frequency of 99 in 304840.

Advancing to step 1:
When dividing 3 by 99, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 99

Going ahead to step 2:
99 can be fit into 30 0 times, resulting in a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 30 leaves us with 30.
Fetch the next digit (4) from the dividend, attach it to 30 and continue: 304 / 99

Let's proceed to step 3:
304 divided by 99 is 3 with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 297 from 304 to get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 99

Step 4:
If we divide 78 by 99, we get 0 and a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 30.0
If we take 0 away from 78, we end up with 78.
Take the next digit (4) from the dividend and append it to 78, then repeat: 784 / 99

Step 5:
When dividing 784 by 99, we get 7 with a remainder of 91.
The next digit of our result is 7. 
Result so far: 307.0
Deduct 693 from 784 and we're left with 91.
Include the next digit (0) from the dividend after 91, then repeat: 910 / 99

Moving on to step 6:
99 goes into 910 9 times with a remainder of 19.
Put 9 as the next digit of the answer. 
Result so far: 3079.0
If we take 891 away from 910, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 7:
99 can be fit into 190 1 times, resulting in a remainder of 91.
Put 1 as the next digit of the answer. 
Result so far: 3079.1
Deduct 99 from 190 and we're left with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Advancing to step 8:
99 can be fit into 910 9 times, resulting in a remainder of 19.
The next digit of our result is 9. 
Result so far: 3079.19
Subtracting 891 from 910 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 9:
The number 99 fits into 190 1 times, leaving a remainder of 91.
The next digit of our result is 1. 
Result so far: 3079.191
Subtracting 99 from 190 leaves us with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

On to step 10:
99 can be fit into 910 9 times, resulting in a remainder of 19.
The next digit of our result is 9. 
Result so far: 3079.1919
Deduct 891 from 910 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 11:
When dividing 190 by 99, we get 1 with a remainder of 91.
Record the quotient 1 as the next digit in the result. 
Result so far: 3079.19191
Subtract 99 from 190 to get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Going ahead to step 12:
99 can be fit into 910 9 times, resulting in a remainder of 19.
The next digit of our result is 9. 
Result so far: 3079.191919
Deduct 891 from 910 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 13:
If we divide 190 by 99, we get 1 and a remainder of 91.
Record the quotient 1 as the next digit in the result. 
Result so far: 3079.1919191
Subtract 99 from 190 to get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Going ahead to step 14:
If we divide 910 by 99, we get 9 and a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 3079.19191919
The remainder is 19 after subtracting 891 from 910.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

After the division, we end up with 3079.19191919 and a remainder of 1.9e-08.