We look at the division of 509414 by 99 
The aim is to understand the frequency of 99 in 509414.

Going ahead to step 1:
If we divide 5 by 99, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 99

On to step 2:
50 divided by 99 is 0 with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 50, we get 50.
Fetch the next digit (9) from the dividend, attach it to 50 and continue: 509 / 99

Let's proceed to step 3:
If we divide 509 by 99, we get 5 and a remainder of 14.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we take 495 away from 509, we end up with 14.
Include the next digit (4) from the dividend after 14, then repeat: 144 / 99

Going ahead to step 4:
144 divided by 99 is 1 with a remainder of 45.
Use 1 as the next digit of our solution. 
Result so far: 51.0
If we take 99 away from 144, we end up with 45.
Take the next digit (1) from the dividend and append it to 45, then repeat: 451 / 99

Advancing to step 5:
The number 99 fits into 451 4 times, leaving a remainder of 55.
The next digit of our result is 4. 
Result so far: 514.0
The remainder is 55 after subtracting 396 from 451.
Take the next digit (4) from the dividend and append it to 55, then repeat: 554 / 99

Step 6:
554 divided by 99 is 5 with a remainder of 59.
The number 5 becomes the next digit in our result. 
Result so far: 5145.0
If we take 495 away from 554, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

On to step 7:
When dividing 590 by 99, we get 5 with a remainder of 95.
Use 5 as the next digit of our solution. 
Result so far: 5145.5
If we take 495 away from 590, we end up with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Step 8:
99 goes into 950 9 times with a remainder of 59.
Put 9 as the next digit of the answer. 
Result so far: 5145.59
If we subtract 891 from 950, we get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Let's proceed to step 9:
The number 99 fits into 590 5 times, leaving a remainder of 95.
The next digit of our result is 5. 
Result so far: 5145.595
Subtract 495 from 590 to get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Step 10:
950 divided by 99 is 9 with a remainder of 59.
The number 9 becomes the next digit in our result. 
Result so far: 5145.5959
The remainder is 59 after subtracting 891 from 950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Step 11:
If we divide 590 by 99, we get 5 and a remainder of 95.
The next digit of our result is 5. 
Result so far: 5145.59595
Deduct 495 from 590 and we're left with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Moving on to step 12:
When dividing 950 by 99, we get 9 with a remainder of 59.
Record the quotient 9 as the next digit in the result. 
Result so far: 5145.595959
The remainder is 59 after subtracting 891 from 950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 13:
590 divided by 99 is 5 with a remainder of 95.
The number 5 becomes the next digit in our result. 
Result so far: 5145.5959595
If we take 495 away from 590, we end up with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Going ahead to step 14:
When dividing 950 by 99, we get 9 with a remainder of 59.
The next digit of our result is 9. 
Result so far: 5145.59595959
If we take 891 away from 950, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

After the division, we end up with 5145.59595959 and a remainder of 5.9e-08.