778617 divided by 99 
The aim is to understand the frequency of 99 in 778617.

On to step 1:
The number 99 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 99

Going ahead to step 2:
77 divided by 99 is 0 with a remainder of 77.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Fetch the next digit (8) from the dividend, attach it to 77 and continue: 778 / 99

Moving on to step 3:
The number 99 fits into 778 7 times, leaving a remainder of 85.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 693 from 778 leaves us with 85.
Bring next digit (6) of the dividend behind the 85 and repeat the process: 856 / 99

On to step 4:
856 divided by 99 is 8 with a remainder of 64.
The next digit of our result is 8. 
Result so far: 78.0
Deduct 792 from 856 and we're left with 64.
Grab the next digit (1) from the dividend, add it to 64, then carry on: 641 / 99

Advancing to step 5:
When dividing 641 by 99, we get 6 with a remainder of 47.
Use 6 as the next digit of our solution. 
Result so far: 786.0
The remainder is 47 after subtracting 594 from 641.
Bring next digit (7) of the dividend behind the 47 and repeat the process: 477 / 99

Moving on to step 6:
99 can be fit into 477 4 times, resulting in a remainder of 81.
Write down 4 as next digit of the result. 
Result so far: 7864.0
Subtracting 396 from 477 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 7:
The number 99 fits into 810 8 times, leaving a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 7864.8
If we subtract 792 from 810, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 8:
180 divided by 99 is 1 with a remainder of 81.
Write down 1 as next digit of the result. 
Result so far: 7864.81
If we take 99 away from 180, we end up with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 9:
When dividing 810 by 99, we get 8 with a remainder of 18.
The next digit of our result is 8. 
Result so far: 7864.818
If we take 792 away from 810, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 10:
99 goes into 180 1 times with a remainder of 81.
Write down 1 as next digit of the result. 
Result so far: 7864.8181
Subtracting 99 from 180 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Step 11:
The number 99 fits into 810 8 times, leaving a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 7864.81818
The remainder is 18 after subtracting 792 from 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 12:
If we divide 180 by 99, we get 1 and a remainder of 81.
The number 1 becomes the next digit in our result. 
Result so far: 7864.818181
Subtracting 99 from 180 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 13:
99 can be fit into 810 8 times, resulting in a remainder of 18.
Use 8 as the next digit of our solution. 
Result so far: 7864.8181818
Deduct 792 from 810 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 14:
If we divide 180 by 99, we get 1 and a remainder of 81.
Write down 1 as next digit of the result. 
Result so far: 7864.81818181
If we take 99 away from 180, we end up with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

The final outcome is 7864.81818181, with a leftover of 8.1e-08.