We look at the division of 128425 by 80 
The aim is to understand the frequency of 80 in 128425.

Step 1:
1 divided by 80 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 80

Let's proceed to step 2:
When dividing 12 by 80, we get 0 with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Include the next digit (8) from the dividend after 12, then repeat: 128 / 80

Step 3:
128 divided by 80 is 1 with a remainder of 48.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 48 after subtracting 80 from 128.
Take the next digit (4) from the dividend and append it to 48, then repeat: 484 / 80

Going ahead to step 4:
484 divided by 80 is 6 with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
If we subtract 480 from 484, we get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 80

Step 5:
When dividing 42 by 80, we get 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 160.0
The remainder is 42 after subtracting 0 from 42.
Grab the next digit (5) from the dividend, add it to 42, then carry on: 425 / 80

Let's proceed to step 6:
80 can be fit into 425 5 times, resulting in a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 1605.0
If we take 400 away from 425, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 7:
The number 80 fits into 250 3 times, leaving a remainder of 10.
The next digit of our result is 3. 
Result so far: 1605.3
Deduct 240 from 250 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
If we divide 100 by 80, we get 1 and a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 1605.31
Subtract 80 from 100 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
80 goes into 200 2 times with a remainder of 40.
The next digit of our result is 2. 
Result so far: 1605.312
The remainder is 40 after subtracting 160 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
If we divide 400 by 80, we get 5 and a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 1605.3125
If we take 400 away from 400, 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 11:
The number 80 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 1605.3125
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.

Going ahead to step 12:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1605.3125
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.

After the division, we end up with 1605.3125 and a remainder of 0.0.