We look at the division of 878386 by 80 
The aim is to understand the frequency of 80 in 878386.

Step 1:
80 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 80

Let's proceed to step 2:
The number 80 fits into 87 1 times, leaving a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 7 after subtracting 80 from 87.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 80

Let's proceed to step 3:
80 goes into 78 0 times with a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we take 0 away from 78, we end up with 78.
Include the next digit (3) from the dividend after 78, then repeat: 783 / 80

Moving on to step 4:
The number 80 fits into 783 9 times, leaving a remainder of 63.
Record the quotient 9 as the next digit in the result. 
Result so far: 109.0
Subtracting 720 from 783 leaves us with 63.
Include the next digit (8) from the dividend after 63, then repeat: 638 / 80

Moving on to step 5:
When dividing 638 by 80, we get 7 with a remainder of 78.
The next digit of our result is 7. 
Result so far: 1097.0
If we subtract 560 from 638, we get 78.
Take the next digit (6) from the dividend and append it to 78, then repeat: 786 / 80

Going ahead to step 6:
When dividing 786 by 80, we get 9 with a remainder of 66.
Record the quotient 9 as the next digit in the result. 
Result so far: 10979.0
The remainder is 66 after subtracting 720 from 786.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 7:
When dividing 660 by 80, we get 8 with a remainder of 20.
The number 8 becomes the next digit in our result. 
Result so far: 10979.8
If we take 640 away from 660, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
When dividing 200 by 80, we get 2 with a remainder of 40.
The next digit of our result is 2. 
Result so far: 10979.82
Subtracting 160 from 200 leaves us 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.

Moving on to step 9:
When dividing 400 by 80, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 10979.825
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.

Moving on to step 10:
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: 10979.825
Subtracting 0 from 0 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.

Step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 10979.825
Subtracting 0 from 0 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.

Our division results in 10979.825 with a remaining 0.0.