73109 ÷ 99 
The aim is to understand the frequency of 99 in 73109.

Step 1:
When dividing 7 by 99, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (3) from the dividend and append it to 7, then repeat: 73 / 99

On to step 2:
If we divide 73 by 99, we get 0 and a remainder of 73.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 73 after subtracting 0 from 73.
Append the next digit (1) from the dividend to 73 and continue with: 731 / 99

On to step 3:
99 can be fit into 731 7 times, resulting in a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtract 693 from 731 to get 38.
Include the next digit (0) from the dividend after 38, then repeat: 380 / 99

Going ahead to step 4:
99 goes into 380 3 times with a remainder of 83.
Write down 3 as next digit of the result. 
Result so far: 73.0
If we take 297 away from 380, we end up with 83.
Grab the next digit (9) from the dividend, add it to 83, then carry on: 839 / 99

On to step 5:
When dividing 839 by 99, we get 8 with a remainder of 47.
Record the quotient 8 as the next digit in the result. 
Result so far: 738.0
If we subtract 792 from 839, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 6:
470 divided by 99 is 4 with a remainder of 74.
The number 4 becomes the next digit in our result. 
Result so far: 738.4
Subtract 396 from 470 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 7:
99 goes into 740 7 times with a remainder of 47.
Record the quotient 7 as the next digit in the result. 
Result so far: 738.47
Subtracting 693 from 740 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 8:
The number 99 fits into 470 4 times, leaving a remainder of 74.
Record the quotient 4 as the next digit in the result. 
Result so far: 738.474
Subtract 396 from 470 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 9:
740 divided by 99 is 7 with a remainder of 47.
The next digit of our result is 7. 
Result so far: 738.4747
The remainder is 47 after subtracting 693 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 10:
If we divide 470 by 99, we get 4 and a remainder of 74.
Write down 4 as next digit of the result. 
Result so far: 738.47474
If we take 396 away from 470, we end up with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 11:
If we divide 740 by 99, we get 7 and a remainder of 47.
Use 7 as the next digit of our solution. 
Result so far: 738.474747
Deduct 693 from 740 and we're left with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 12:
When dividing 470 by 99, we get 4 with a remainder of 74.
Put 4 as the next digit of the answer. 
Result so far: 738.4747474
The remainder is 74 after subtracting 396 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 13:
740 divided by 99 is 7 with a remainder of 47.
Use 7 as the next digit of our solution. 
Result so far: 738.47474747
Subtract 693 from 740 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

The final outcome is 738.47474747, with a leftover of 4.7e-08.