We look at the division of 400135 by 80 
The aim is to understand the frequency of 80 in 400135.

On to step 1:
When dividing 4 by 80, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 80

Let's proceed to step 2:
80 can be fit into 40 0 times, resulting in a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Bring next digit (0) of the dividend behind the 40 and repeat the process: 400 / 80

Moving on to step 3:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtracting 400 from 400 leaves us with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 80

On to step 4:
The number 80 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 50.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 80

Moving on to step 5:
80 can be fit into 13 0 times, resulting in a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 500.0
If we subtract 0 from 13, we get 13.
Take the next digit (5) from the dividend and append it to 13, then repeat: 135 / 80

Advancing to step 6:
When dividing 135 by 80, we get 1 with a remainder of 55.
Write down 1 as next digit of the result. 
Result so far: 5001.0
If we take 80 away from 135, we end up with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Moving on to step 7:
The number 80 fits into 550 6 times, leaving a remainder of 70.
Use 6 as the next digit of our solution. 
Result so far: 5001.6
Subtracting 480 from 550 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.

Let's proceed to step 8:
When dividing 700 by 80, we get 8 with a remainder of 60.
Put 8 as the next digit of the answer. 
Result so far: 5001.68
Subtract 640 from 700 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
The number 80 fits into 600 7 times, leaving a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 5001.687
Deduct 560 from 600 and we're left 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.

Advancing to step 10:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 5001.6875
Subtracting 400 from 400 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 11:
0 divided by 80 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 5001.6875
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.

Step 12:
If we divide 0 by 80, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 5001.6875
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 outcome is 5001.6875, with a leftover of 0.0.