We look at the division of 981528 by 80 
The aim is to understand the frequency of 80 in 981528.

Let's proceed to step 1:
9 divided by 80 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 80

Let's proceed to step 2:
The number 80 fits into 98 1 times, leaving a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 80 from 98 and we're left with 18.
Take the next digit (1) from the dividend and append it to 18, then repeat: 181 / 80

Let's proceed to step 3:
80 goes into 181 2 times with a remainder of 21.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtracting 160 from 181 leaves us with 21.
Bring next digit (5) of the dividend behind the 21 and repeat the process: 215 / 80

On to step 4:
80 goes into 215 2 times with a remainder of 55.
Put 2 as the next digit of the answer. 
Result so far: 122.0
The remainder is 55 after subtracting 160 from 215.
Include the next digit (2) from the dividend after 55, then repeat: 552 / 80

Going ahead to step 5:
552 divided by 80 is 6 with a remainder of 72.
Put 6 as the next digit of the answer. 
Result so far: 1226.0
Subtract 480 from 552 to get 72.
Grab the next digit (8) from the dividend, add it to 72, then carry on: 728 / 80

On to step 6:
80 can be fit into 728 9 times, resulting in a remainder of 8.
Record the quotient 9 as the next digit in the result. 
Result so far: 12269.0
Subtract 720 from 728 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 7:
When dividing 80 by 80, we get 1 with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 12269.1
Subtracting 80 from 80 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 8:
80 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 12269.1
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.

Let's proceed to step 9:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 12269.1
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.

The final result is 12269.1 with a remainder of 0.0.