We're dividing 39687 by 80 
The aim is to understand the frequency of 80 in 39687.

Advancing to step 1:
When dividing 3 by 80, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 80

Advancing to step 2:
If we divide 39 by 80, we get 0 and a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Include the next digit (6) from the dividend after 39, then repeat: 396 / 80

Let's proceed to step 3:
80 goes into 396 4 times with a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 320 from 396, we get 76.
Take the next digit (8) from the dividend and append it to 76, then repeat: 768 / 80

Advancing to step 4:
80 goes into 768 9 times with a remainder of 48.
Use 9 as the next digit of our solution. 
Result so far: 49.0
The remainder is 48 after subtracting 720 from 768.
Append the next digit (7) from the dividend to 48 and continue with: 487 / 80

Step 5:
487 divided by 80 is 6 with a remainder of 7.
Write down 6 as next digit of the result. 
Result so far: 496.0
Subtracting 480 from 487 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 6:
70 divided by 80 is 0 with a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 496.0
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 7:
80 can be fit into 700 8 times, resulting in a remainder of 60.
The number 8 becomes the next digit in our result. 
Result so far: 496.08
Subtracting 640 from 700 leaves us 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.

Moving on to step 8:
When dividing 600 by 80, we get 7 with a remainder of 40.
The next digit of our result is 7. 
Result so far: 496.087
If we take 560 away from 600, we end up 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.
Record the quotient 5 as the next digit in the result. 
Result so far: 496.0875
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.

Let's proceed to step 10:
If we divide 0 by 80, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 496.0875
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.

Moving on to step 11:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 496.0875
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 496.0875 with a remainder of 0.0.