7893861 ÷ 843 
The aim is to understand the frequency of 843 in 7893861.

Advancing to step 1:
When dividing 7 by 843, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 843

Step 2:
843 goes into 78 0 times with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Bring next digit (9) of the dividend behind the 78 and repeat the process: 789 / 843

Advancing to step 3:
The number 843 fits into 789 0 times, leaving a remainder of 789.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 789, we get 789.
Append the next digit (3) from the dividend to 789 and continue with: 7893 / 843

Advancing to step 4:
7893 divided by 843 is 9 with a remainder of 306.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 306 after subtracting 7587 from 7893.
Fetch the next digit (8) from the dividend, attach it to 306 and continue: 3068 / 843

Moving on to step 5:
When dividing 3068 by 843, we get 3 with a remainder of 539.
The number 3 becomes the next digit in our result. 
Result so far: 93.0
Subtract 2529 from 3068 to get 539.
Include the next digit (6) from the dividend after 539, then repeat: 5396 / 843

Let's proceed to step 6:
843 can be fit into 5396 6 times, resulting in a remainder of 338.
Put 6 as the next digit of the answer. 
Result so far: 936.0
The remainder is 338 after subtracting 5058 from 5396.
Fetch the next digit (1) from the dividend, attach it to 338 and continue: 3381 / 843

Going ahead to step 7:
The number 843 fits into 3381 4 times, leaving a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 9364.0
The remainder is 9 after subtracting 3372 from 3381.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 8:
If we divide 90 by 843, we get 0 and a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 9364.0
Subtracting 0 from 90 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

On to step 9:
The number 843 fits into 900 1 times, leaving a remainder of 57.
The next digit of our result is 1. 
Result so far: 9364.01
If we subtract 843 from 900, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 10:
843 goes into 570 0 times with a remainder of 570.
Use 0 as the next digit of our solution. 
Result so far: 9364.01
Subtracting 0 from 570 leaves us with 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Moving on to step 11:
5700 divided by 843 is 6 with a remainder of 642.
Write down 6 as next digit of the result. 
Result so far: 9364.0106
If we take 5058 away from 5700, we end up with 642.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6420, and continue the process.

On to step 12:
The number 843 fits into 6420 7 times, leaving a remainder of 519.
Record the quotient 7 as the next digit in the result. 
Result so far: 9364.01067
If we take 5901 away from 6420, we end up with 519.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5190, and continue the process.

Let's proceed to step 13:
When dividing 5190 by 843, we get 6 with a remainder of 132.
Record the quotient 6 as the next digit in the result. 
Result so far: 9364.010676
The remainder is 132 after subtracting 5058 from 5190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Step 14:
843 goes into 1320 1 times with a remainder of 477.
The number 1 becomes the next digit in our result. 
Result so far: 9364.0106761
If we subtract 843 from 1320, we get 477.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4770, and continue the process.

Going ahead to step 15:
843 goes into 4770 5 times with a remainder of 555.
Write down 5 as next digit of the result. 
Result so far: 9364.01067615
Subtract 4215 from 4770 to get 555.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5550, and continue the process.

After the division, we end up with 9364.01067615 and a remainder of 5.55e-07.