997666 divided by 99 
The aim is to understand the frequency of 99 in 997666.

Step 1:
99 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 99

Step 2:
If we divide 99 by 99, we get 1 and a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 99 from 99 leaves us with 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 99

Advancing to step 3:
If we divide 7 by 99, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (6) from the dividend, add it to 7, then carry on: 76 / 99

Advancing to step 4:
When dividing 76 by 99, we get 0 with a remainder of 76.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
Subtracting 0 from 76 leaves us with 76.
Fetch the next digit (6) from the dividend, attach it to 76 and continue: 766 / 99

On to step 5:
766 divided by 99 is 7 with a remainder of 73.
Record the quotient 7 as the next digit in the result. 
Result so far: 1007.0
If we take 693 away from 766, we end up with 73.
Grab the next digit (6) from the dividend, add it to 73, then carry on: 736 / 99

On to step 6:
99 can be fit into 736 7 times, resulting in a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 10077.0
Subtracting 693 from 736 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 7:
The number 99 fits into 430 4 times, leaving a remainder of 34.
The number 4 becomes the next digit in our result. 
Result so far: 10077.4
Subtracting 396 from 430 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 8:
If we divide 340 by 99, we get 3 and a remainder of 43.
The next digit of our result is 3. 
Result so far: 10077.43
If we subtract 297 from 340, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 9:
99 goes into 430 4 times with a remainder of 34.
Record the quotient 4 as the next digit in the result. 
Result so far: 10077.434
Deduct 396 from 430 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 10:
99 goes into 340 3 times with a remainder of 43.
Record the quotient 3 as the next digit in the result. 
Result so far: 10077.4343
Subtract 297 from 340 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 11:
If we divide 430 by 99, we get 4 and a remainder of 34.
The number 4 becomes the next digit in our result. 
Result so far: 10077.43434
Deduct 396 from 430 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 12:
340 divided by 99 is 3 with a remainder of 43.
Write down 3 as next digit of the result. 
Result so far: 10077.434343
Subtracting 297 from 340 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 13:
99 goes into 430 4 times with a remainder of 34.
The next digit of our result is 4. 
Result so far: 10077.4343434
If we subtract 396 from 430, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 14:
If we divide 340 by 99, we get 3 and a remainder of 43.
The number 3 becomes the next digit in our result. 
Result so far: 10077.43434343
If we take 297 away from 340, we end up with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The final outcome is 10077.43434343, with a leftover of 4.3e-08.