987918 divided by 80 
The aim is to understand the frequency of 80 in 987918.

Advancing to step 1:
When dividing 9 by 80, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 80

On to step 2:
98 divided by 80 is 1 with a remainder of 18.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 80 from 98 leaves us with 18.
Include the next digit (7) from the dividend after 18, then repeat: 187 / 80

Moving on to step 3:
80 can be fit into 187 2 times, resulting in a remainder of 27.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
The remainder is 27 after subtracting 160 from 187.
Take the next digit (9) from the dividend and append it to 27, then repeat: 279 / 80

Step 4:
80 goes into 279 3 times with a remainder of 39.
Put 3 as the next digit of the answer. 
Result so far: 123.0
Deduct 240 from 279 and we're left with 39.
Include the next digit (1) from the dividend after 39, then repeat: 391 / 80

Moving on to step 5:
The number 80 fits into 391 4 times, leaving a remainder of 71.
Use 4 as the next digit of our solution. 
Result so far: 1234.0
Subtract 320 from 391 to get 71.
Include the next digit (8) from the dividend after 71, then repeat: 718 / 80

On to step 6:
If we divide 718 by 80, we get 8 and a remainder of 78.
Record the quotient 8 as the next digit in the result. 
Result so far: 12348.0
If we subtract 640 from 718, 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.

Going ahead to step 7:
When dividing 780 by 80, we get 9 with a remainder of 60.
Write down 9 as next digit of the result. 
Result so far: 12348.9
Deduct 720 from 780 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 8:
The number 80 fits into 600 7 times, leaving a remainder of 40.
Use 7 as the next digit of our solution. 
Result so far: 12348.97
Subtract 560 from 600 to get 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:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 12348.975
Subtracting 400 from 400 leaves us 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.

Advancing to step 10:
If we divide 0 by 80, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 12348.975
If we take 0 away from 0, we end up 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.

Step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 12348.975
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 12348.975 with a balance of 0.0.