We look at the division of 771553 by 99 
The aim is to understand the frequency of 99 in 771553.

Advancing to step 1:
7 divided by 99 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 99

On to step 2:
99 can be fit into 77 0 times, resulting in a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 77 after subtracting 0 from 77.
Append the next digit (1) from the dividend to 77 and continue with: 771 / 99

On to step 3:
99 can be fit into 771 7 times, resulting in a remainder of 78.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we take 693 away from 771, we end up with 78.
Fetch the next digit (5) from the dividend, attach it to 78 and continue: 785 / 99

On to step 4:
If we divide 785 by 99, we get 7 and a remainder of 92.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
Deduct 693 from 785 and we're left with 92.
Grab the next digit (5) from the dividend, add it to 92, then carry on: 925 / 99

On to step 5:
925 divided by 99 is 9 with a remainder of 34.
Write down 9 as next digit of the result. 
Result so far: 779.0
Subtract 891 from 925 to get 34.
Grab the next digit (3) from the dividend, add it to 34, then carry on: 343 / 99

Let's proceed to step 6:
99 can be fit into 343 3 times, resulting in a remainder of 46.
The next digit of our result is 3. 
Result so far: 7793.0
The remainder is 46 after subtracting 297 from 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 7:
99 can be fit into 460 4 times, resulting in a remainder of 64.
The number 4 becomes the next digit in our result. 
Result so far: 7793.4
The remainder is 64 after subtracting 396 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 8:
99 goes into 640 6 times with a remainder of 46.
Put 6 as the next digit of the answer. 
Result so far: 7793.46
The remainder is 46 after subtracting 594 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 9:
99 goes into 460 4 times with a remainder of 64.
The number 4 becomes the next digit in our result. 
Result so far: 7793.464
If we subtract 396 from 460, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 10:
99 can be fit into 640 6 times, resulting in a remainder of 46.
The number 6 becomes the next digit in our result. 
Result so far: 7793.4646
The remainder is 46 after subtracting 594 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 11:
99 goes into 460 4 times with a remainder of 64.
Put 4 as the next digit of the answer. 
Result so far: 7793.46464
If we take 396 away from 460, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 12:
99 goes into 640 6 times with a remainder of 46.
The number 6 becomes the next digit in our result. 
Result so far: 7793.464646
Subtract 594 from 640 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 13:
The number 99 fits into 460 4 times, leaving a remainder of 64.
The number 4 becomes the next digit in our result. 
Result so far: 7793.4646464
Subtracting 396 from 460 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 14:
640 divided by 99 is 6 with a remainder of 46.
The number 6 becomes the next digit in our result. 
Result so far: 7793.46464646
If we take 594 away from 640, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

The final result is 7793.46464646 with a remainder of 4.6e-08.