75725354 ÷ 99 
The aim is to understand the frequency of 99 in 75725354.

Moving on to step 1:
When dividing 7 by 99, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 99

Step 2:
75 divided by 99 is 0 with a remainder of 75.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 75 leaves us with 75.
Grab the next digit (7) from the dividend, add it to 75, then carry on: 757 / 99

Moving on to step 3:
The number 99 fits into 757 7 times, leaving a remainder of 64.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 693 from 757 to get 64.
Grab the next digit (2) from the dividend, add it to 64, then carry on: 642 / 99

Step 4:
The number 99 fits into 642 6 times, leaving a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 76.0
If we take 594 away from 642, we end up with 48.
Grab the next digit (5) from the dividend, add it to 48, then carry on: 485 / 99

Advancing to step 5:
99 goes into 485 4 times with a remainder of 89.
The next digit of our result is 4. 
Result so far: 764.0
Deduct 396 from 485 and we're left with 89.
Take the next digit (3) from the dividend and append it to 89, then repeat: 893 / 99

Advancing to step 6:
If we divide 893 by 99, we get 9 and a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 7649.0
If we take 891 away from 893, we end up with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 99

Moving on to step 7:
If we divide 25 by 99, we get 0 and a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 76490.0
Subtract 0 from 25 to get 25.
Take the next digit (4) from the dividend and append it to 25, then repeat: 254 / 99

On to step 8:
99 goes into 254 2 times with a remainder of 56.
Record the quotient 2 as the next digit in the result. 
Result so far: 764902.0
Subtract 198 from 254 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 9:
560 divided by 99 is 5 with a remainder of 65.
The number 5 becomes the next digit in our result. 
Result so far: 764902.5
Subtract 495 from 560 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 10:
99 goes into 650 6 times with a remainder of 56.
The next digit of our result is 6. 
Result so far: 764902.56
If we subtract 594 from 650, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 11:
99 can be fit into 560 5 times, resulting in a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 764902.565
Subtract 495 from 560 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 12:
650 divided by 99 is 6 with a remainder of 56.
The number 6 becomes the next digit in our result. 
Result so far: 764902.5656
Subtracting 594 from 650 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 13:
560 divided by 99 is 5 with a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 764902.56565
Subtract 495 from 560 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Moving on to step 14:
99 can be fit into 650 6 times, resulting in a remainder of 56.
Record the quotient 6 as the next digit in the result. 
Result so far: 764902.565656
Subtracting 594 from 650 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 15:
99 goes into 560 5 times with a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 764902.5656565
The remainder is 65 after subtracting 495 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 16:
650 divided by 99 is 6 with a remainder of 56.
Put 6 as the next digit of the answer. 
Result so far: 764902.56565656
Subtracting 594 from 650 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

After the division, we end up with 764902.56565656 and a remainder of 5.6e-08.