We're dividing 685392 by 80 
The aim is to understand the frequency of 80 in 685392.

On to step 1:
When dividing 6 by 80, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 80

Going ahead to step 2:
68 divided by 80 is 0 with a remainder of 68.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 68, we end up with 68.
Grab the next digit (5) from the dividend, add it to 68, then carry on: 685 / 80

Moving on to step 3:
80 can be fit into 685 8 times, resulting in a remainder of 45.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 640 from 685, we get 45.
Fetch the next digit (3) from the dividend, attach it to 45 and continue: 453 / 80

Let's proceed to step 4:
The number 80 fits into 453 5 times, leaving a remainder of 53.
Record the quotient 5 as the next digit in the result. 
Result so far: 85.0
The remainder is 53 after subtracting 400 from 453.
Take the next digit (9) from the dividend and append it to 53, then repeat: 539 / 80

Moving on to step 5:
The number 80 fits into 539 6 times, leaving a remainder of 59.
Put 6 as the next digit of the answer. 
Result so far: 856.0
If we subtract 480 from 539, we get 59.
Bring next digit (2) of the dividend behind the 59 and repeat the process: 592 / 80

Moving on to step 6:
80 can be fit into 592 7 times, resulting in a remainder of 32.
Write down 7 as next digit of the result. 
Result so far: 8567.0
The remainder is 32 after subtracting 560 from 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 7:
320 divided by 80 is 4 with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 8567.4
If we take 320 away from 320, 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 8:
If we divide 0 by 80, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 8567.4
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 9:
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: 8567.4
Subtracting 0 from 0 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.

The quotient of the division is 8567.4, and the remainder is 0.0.