We look at the division of 83616 by 80 
The aim is to understand the frequency of 80 in 83616.

Going ahead to step 1:
8 divided by 80 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 80

Let's proceed to step 2:
83 divided by 80 is 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 3 after subtracting 80 from 83.
Take the next digit (6) from the dividend and append it to 3, then repeat: 36 / 80

On to step 3:
If we divide 36 by 80, we get 0 and a remainder of 36.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we take 0 away from 36, we end up with 36.
Fetch the next digit (1) from the dividend, attach it to 36 and continue: 361 / 80

Going ahead to step 4:
80 goes into 361 4 times with a remainder of 41.
The next digit of our result is 4. 
Result so far: 104.0
If we take 320 away from 361, we end up with 41.
Fetch the next digit (6) from the dividend, attach it to 41 and continue: 416 / 80

On to step 5:
80 can be fit into 416 5 times, resulting in a remainder of 16.
The number 5 becomes the next digit in our result. 
Result so far: 1045.0
The remainder is 16 after subtracting 400 from 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 6:
160 divided by 80 is 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 1045.2
Subtract 160 from 160 to get 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 7:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1045.2
If we subtract 0 from 0, we get 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 8:
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: 1045.2
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.

The final result is 1045.2 with a remainder of 0.0.