663606 divided by 80 
The aim is to understand the frequency of 80 in 663606.

Step 1:
6 divided by 80 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 80

Advancing to step 2:
80 goes into 66 0 times with a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Append the next digit (3) from the dividend to 66 and continue with: 663 / 80

Going ahead to step 3:
If we divide 663 by 80, we get 8 and a remainder of 23.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 640 from 663, we get 23.
Append the next digit (6) from the dividend to 23 and continue with: 236 / 80

Advancing to step 4:
If we divide 236 by 80, we get 2 and a remainder of 76.
Use 2 as the next digit of our solution. 
Result so far: 82.0
If we subtract 160 from 236, we get 76.
Grab the next digit (0) from the dividend, add it to 76, then carry on: 760 / 80

Going ahead to step 5:
If we divide 760 by 80, we get 9 and a remainder of 40.
The number 9 becomes the next digit in our result. 
Result so far: 829.0
The remainder is 40 after subtracting 720 from 760.
Include the next digit (6) from the dividend after 40, then repeat: 406 / 80

Advancing to step 6:
When dividing 406 by 80, we get 5 with a remainder of 6.
Record the quotient 5 as the next digit in the result. 
Result so far: 8295.0
Subtracting 400 from 406 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
If we divide 60 by 80, we get 0 and a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 8295.0
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 8:
The number 80 fits into 600 7 times, leaving a remainder of 40.
Put 7 as the next digit of the answer. 
Result so far: 8295.07
Subtracting 560 from 600 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 9:
When dividing 400 by 80, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 8295.075
Deduct 400 from 400 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
0 divided by 80 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 8295.075
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 11:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 8295.075
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 8295.075 with a balance of 0.0.