We're dividing 811252 by 78 
The aim is to understand the frequency of 78 in 811252.

Step 1:
If we divide 8 by 78, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 78

Going ahead to step 2:
The number 78 fits into 81 1 times, leaving a remainder of 3.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 78 from 81 and we're left with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 78

Going ahead to step 3:
78 can be fit into 31 0 times, resulting in a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we take 0 away from 31, we end up with 31.
Append the next digit (2) from the dividend to 31 and continue with: 312 / 78

Advancing to step 4:
If we divide 312 by 78, we get 4 and a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 104.0
Subtract 312 from 312 to get 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 78

Going ahead to step 5:
When dividing 5 by 78, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 1040.0
Subtracting 0 from 5 leaves us with 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 78

On to step 6:
78 goes into 52 0 times with a remainder of 52.
The next digit of our result is 0. 
Result so far: 10400.0
The remainder is 52 after subtracting 0 from 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 7:
78 goes into 520 6 times with a remainder of 52.
Put 6 as the next digit of the answer. 
Result so far: 10400.6
Subtract 468 from 520 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 8:
520 divided by 78 is 6 with a remainder of 52.
Put 6 as the next digit of the answer. 
Result so far: 10400.66
Subtract 468 from 520 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The quotient of the division is 10400.66, and the remainder is 0.052.