We look at the division of 136968 by 80 
The aim is to understand the frequency of 80 in 136968.

On to step 1:
If we divide 1 by 80, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 80

Moving on to step 2:
80 can be fit into 13 0 times, resulting in a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Append the next digit (6) from the dividend to 13 and continue with: 136 / 80

Advancing to step 3:
136 divided by 80 is 1 with a remainder of 56.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 80 away from 136, we end up with 56.
Bring next digit (9) of the dividend behind the 56 and repeat the process: 569 / 80

On to step 4:
When dividing 569 by 80, we get 7 with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
If we subtract 560 from 569, we get 9.
Bring next digit (6) of the dividend behind the 9 and repeat the process: 96 / 80

Step 5:
96 divided by 80 is 1 with a remainder of 16.
Write down 1 as next digit of the result. 
Result so far: 171.0
Subtract 80 from 96 to get 16.
Take the next digit (8) from the dividend and append it to 16, then repeat: 168 / 80

On to step 6:
80 can be fit into 168 2 times, resulting in a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 1712.0
If we take 160 away from 168, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 7:
80 divided by 80 is 1 with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1712.1
Deduct 80 from 80 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.

On to step 8:
When dividing 0 by 80, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1712.1
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.

Going ahead to step 9:
When dividing 0 by 80, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 1712.1
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.

After the division, we end up with 1712.1 and a remainder of 0.0.