We look at the division of 51203676 by 843 
The aim is to understand the frequency of 843 in 51203676.

On to step 1:
843 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 843

On to step 2:
When dividing 51 by 843, we get 0 with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Fetch the next digit (2) from the dividend, attach it to 51 and continue: 512 / 843

Let's proceed to step 3:
843 can be fit into 512 0 times, resulting in a remainder of 512.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 512, we get 512.
Grab the next digit (0) from the dividend, add it to 512, then carry on: 5120 / 843

Step 4:
The number 843 fits into 5120 6 times, leaving a remainder of 62.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 62 after subtracting 5058 from 5120.
Append the next digit (3) from the dividend to 62 and continue with: 623 / 843

Advancing to step 5:
843 goes into 623 0 times with a remainder of 623.
The number 0 becomes the next digit in our result. 
Result so far: 60.0
The remainder is 623 after subtracting 0 from 623.
Take the next digit (6) from the dividend and append it to 623, then repeat: 6236 / 843

Step 6:
843 goes into 6236 7 times with a remainder of 335.
Put 7 as the next digit of the answer. 
Result so far: 607.0
The remainder is 335 after subtracting 5901 from 6236.
Include the next digit (7) from the dividend after 335, then repeat: 3357 / 843

Moving on to step 7:
843 can be fit into 3357 3 times, resulting in a remainder of 828.
Use 3 as the next digit of our solution. 
Result so far: 6073.0
Subtract 2529 from 3357 to get 828.
Take the next digit (6) from the dividend and append it to 828, then repeat: 8286 / 843

Step 8:
The number 843 fits into 8286 9 times, leaving a remainder of 699.
Put 9 as the next digit of the answer. 
Result so far: 60739.0
If we take 7587 away from 8286, we end up with 699.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6990, and continue the process.

On to step 9:
The number 843 fits into 6990 8 times, leaving a remainder of 246.
Write down 8 as next digit of the result. 
Result so far: 60739.8
If we subtract 6744 from 6990, we get 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Step 10:
843 can be fit into 2460 2 times, resulting in a remainder of 774.
Write down 2 as next digit of the result. 
Result so far: 60739.82
Subtract 1686 from 2460 to get 774.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7740, and continue the process.

On to step 11:
843 can be fit into 7740 9 times, resulting in a remainder of 153.
The next digit of our result is 9. 
Result so far: 60739.829
Deduct 7587 from 7740 and we're left with 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Step 12:
1530 divided by 843 is 1 with a remainder of 687.
The next digit of our result is 1. 
Result so far: 60739.8291
Deduct 843 from 1530 and we're left with 687.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6870, and continue the process.

Let's proceed to step 13:
The number 843 fits into 6870 8 times, leaving a remainder of 126.
Put 8 as the next digit of the answer. 
Result so far: 60739.82918
Deduct 6744 from 6870 and we're left with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Moving on to step 14:
843 goes into 1260 1 times with a remainder of 417.
The next digit of our result is 1. 
Result so far: 60739.829181
The remainder is 417 after subtracting 843 from 1260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4170, and continue the process.

On to step 15:
If we divide 4170 by 843, we get 4 and a remainder of 798.
Write down 4 as next digit of the result. 
Result so far: 60739.8291814
Subtracting 3372 from 4170 leaves us with 798.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7980, and continue the process.

Going ahead to step 16:
If we divide 7980 by 843, we get 9 and a remainder of 393.
The number 9 becomes the next digit in our result. 
Result so far: 60739.82918149
Subtract 7587 from 7980 to get 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

After the division, we end up with 60739.82918149 and a remainder of 3.93e-07.