970980 ÷ 99 
The aim is to understand the frequency of 99 in 970980.

Step 1:
If we divide 9 by 99, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Grab the next digit (7) from the dividend, add it to 9, then carry on: 97 / 99

Moving on to step 2:
97 divided by 99 is 0 with a remainder of 97.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 97 to get 97.
Take the next digit (0) from the dividend and append it to 97, then repeat: 970 / 99

Step 3:
99 can be fit into 970 9 times, resulting in a remainder of 79.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtracting 891 from 970 leaves us with 79.
Take the next digit (9) from the dividend and append it to 79, then repeat: 799 / 99

Moving on to step 4:
The number 99 fits into 799 8 times, leaving a remainder of 7.
Record the quotient 8 as the next digit in the result. 
Result so far: 98.0
Subtracting 792 from 799 leaves us with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 99

Moving on to step 5:
99 can be fit into 78 0 times, resulting in a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 980.0
Subtracting 0 from 78 leaves us with 78.
Include the next digit (0) from the dividend after 78, then repeat: 780 / 99

Step 6:
99 goes into 780 7 times with a remainder of 87.
The next digit of our result is 7. 
Result so far: 9807.0
If we take 693 away from 780, we end up with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Advancing to step 7:
99 goes into 870 8 times with a remainder of 78.
Use 8 as the next digit of our solution. 
Result so far: 9807.8
If we subtract 792 from 870, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 8:
When dividing 780 by 99, we get 7 with a remainder of 87.
Write down 7 as next digit of the result. 
Result so far: 9807.87
Deduct 693 from 780 and we're left with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Going ahead to step 9:
When dividing 870 by 99, we get 8 with a remainder of 78.
Put 8 as the next digit of the answer. 
Result so far: 9807.878
If we subtract 792 from 870, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 10:
780 divided by 99 is 7 with a remainder of 87.
The next digit of our result is 7. 
Result so far: 9807.8787
Subtracting 693 from 780 leaves us with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Let's proceed to step 11:
870 divided by 99 is 8 with a remainder of 78.
The next digit of our result is 8. 
Result so far: 9807.87878
Subtracting 792 from 870 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Advancing to step 12:
If we divide 780 by 99, we get 7 and a remainder of 87.
The number 7 becomes the next digit in our result. 
Result so far: 9807.878787
Subtract 693 from 780 to get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Going ahead to step 13:
If we divide 870 by 99, we get 8 and a remainder of 78.
Use 8 as the next digit of our solution. 
Result so far: 9807.8787878
If we subtract 792 from 870, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 14:
The number 99 fits into 780 7 times, leaving a remainder of 87.
The next digit of our result is 7. 
Result so far: 9807.87878787
Subtracting 693 from 780 leaves us with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

The final result is 9807.87878787 with a remainder of 8.7e-08.