We look at the division of 84401243 by 843 
The aim is to understand the frequency of 843 in 84401243.

Advancing to step 1:
843 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 843

Going ahead to step 2:
The number 843 fits into 84 0 times, leaving a remainder of 84.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 84 after subtracting 0 from 84.
Append the next digit (4) from the dividend to 84 and continue with: 844 / 843

Let's proceed to step 3:
If we divide 844 by 843, we get 1 and a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 1 after subtracting 843 from 844.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 843

Advancing to step 4:
843 goes into 10 0 times with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtract 0 from 10 to get 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 843

On to step 5:
843 can be fit into 101 0 times, resulting in a remainder of 101.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
The remainder is 101 after subtracting 0 from 101.
Fetch the next digit (2) from the dividend, attach it to 101 and continue: 1012 / 843

On to step 6:
1012 divided by 843 is 1 with a remainder of 169.
Record the quotient 1 as the next digit in the result. 
Result so far: 1001.0
If we subtract 843 from 1012, we get 169.
Append the next digit (4) from the dividend to 169 and continue with: 1694 / 843

On to step 7:
843 can be fit into 1694 2 times, resulting in a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 10012.0
Deduct 1686 from 1694 and we're left with 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 843

Going ahead to step 8:
83 divided by 843 is 0 with a remainder of 83.
Write down 0 as next digit of the result. 
Result so far: 100120.0
If we take 0 away from 83, we end up with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

On to step 9:
843 goes into 830 0 times with a remainder of 830.
The number 0 becomes the next digit in our result. 
Result so far: 100120.0
If we subtract 0 from 830, we get 830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8300, and continue the process.

Let's proceed to step 10:
If we divide 8300 by 843, we get 9 and a remainder of 713.
Record the quotient 9 as the next digit in the result. 
Result so far: 100120.09
If we subtract 7587 from 8300, we get 713.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7130, and continue the process.

Let's proceed to step 11:
If we divide 7130 by 843, we get 8 and a remainder of 386.
The next digit of our result is 8. 
Result so far: 100120.098
Subtract 6744 from 7130 to get 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Moving on to step 12:
3860 divided by 843 is 4 with a remainder of 488.
The number 4 becomes the next digit in our result. 
Result so far: 100120.0984
If we subtract 3372 from 3860, we get 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Advancing to step 13:
If we divide 4880 by 843, we get 5 and a remainder of 665.
Use 5 as the next digit of our solution. 
Result so far: 100120.09845
Subtract 4215 from 4880 to get 665.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6650, and continue the process.

Advancing to step 14:
The number 843 fits into 6650 7 times, leaving a remainder of 749.
The number 7 becomes the next digit in our result. 
Result so far: 100120.098457
If we subtract 5901 from 6650, we get 749.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7490, and continue the process.

Advancing to step 15:
When dividing 7490 by 843, we get 8 with a remainder of 746.
The number 8 becomes the next digit in our result. 
Result so far: 100120.0984578
The remainder is 746 after subtracting 6744 from 7490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7460, and continue the process.

Advancing to step 16:
When dividing 7460 by 843, we get 8 with a remainder of 716.
The next digit of our result is 8. 
Result so far: 100120.09845788
If we subtract 6744 from 7460, we get 716.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7160, and continue the process.

After the division, we end up with 100120.09845788 and a remainder of 7.16e-07.