We're dividing 728811 by 86 
The aim is to understand the frequency of 86 in 728811.

Step 1:
7 divided by 86 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 86

Moving on to step 2:
The number 86 fits into 72 0 times, leaving a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 72 and we're left with 72.
Take the next digit (8) from the dividend and append it to 72, then repeat: 728 / 86

Step 3:
86 goes into 728 8 times with a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Deduct 688 from 728 and we're left with 40.
Include the next digit (8) from the dividend after 40, then repeat: 408 / 86

Moving on to step 4:
The number 86 fits into 408 4 times, leaving a remainder of 64.
Put 4 as the next digit of the answer. 
Result so far: 84.0
The remainder is 64 after subtracting 344 from 408.
Take the next digit (1) from the dividend and append it to 64, then repeat: 641 / 86

Moving on to step 5:
If we divide 641 by 86, we get 7 and a remainder of 39.
The number 7 becomes the next digit in our result. 
Result so far: 847.0
If we subtract 602 from 641, we get 39.
Take the next digit (1) from the dividend and append it to 39, then repeat: 391 / 86

Going ahead to step 6:
When dividing 391 by 86, we get 4 with a remainder of 47.
Record the quotient 4 as the next digit in the result. 
Result so far: 8474.0
Subtract 344 from 391 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 7:
If we divide 470 by 86, we get 5 and a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 8474.5
If we subtract 430 from 470, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 8:
86 goes into 400 4 times with a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 8474.54
Subtract 344 from 400 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 9:
86 goes into 560 6 times with a remainder of 44.
Put 6 as the next digit of the answer. 
Result so far: 8474.546
If we subtract 516 from 560, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 10:
The number 86 fits into 440 5 times, leaving a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 8474.5465
The remainder is 10 after subtracting 430 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 11:
86 goes into 100 1 times with a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 8474.54651
Subtract 86 from 100 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 12:
If we divide 140 by 86, we get 1 and a remainder of 54.
Record the quotient 1 as the next digit in the result. 
Result so far: 8474.546511
If we subtract 86 from 140, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The quotient of the division is 8474.546511, and the remainder is 5.4e-06.