561243 ÷ 43 
The aim is to understand the frequency of 43 in 561243.

Advancing to step 1:
When dividing 5 by 43, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (6) from the dividend and append it to 5, then repeat: 56 / 43

Step 2:
56 divided by 43 is 1 with a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 43 from 56 to get 13.
Include the next digit (1) from the dividend after 13, then repeat: 131 / 43

Going ahead to step 3:
If we divide 131 by 43, we get 3 and a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Subtract 129 from 131 to get 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 43

On to step 4:
43 goes into 22 0 times with a remainder of 22.
Write down 0 as next digit of the result. 
Result so far: 130.0
The remainder is 22 after subtracting 0 from 22.
Fetch the next digit (4) from the dividend, attach it to 22 and continue: 224 / 43

Step 5:
If we divide 224 by 43, we get 5 and a remainder of 9.
The next digit of our result is 5. 
Result so far: 1305.0
Deduct 215 from 224 and we're left with 9.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 43

Going ahead to step 6:
43 goes into 93 2 times with a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 13052.0
Deduct 86 from 93 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
When dividing 70 by 43, we get 1 with a remainder of 27.
Use 1 as the next digit of our solution. 
Result so far: 13052.1
Subtracting 43 from 70 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 8:
When dividing 270 by 43, we get 6 with a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 13052.16
If we take 258 away from 270, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
120 divided by 43 is 2 with a remainder of 34.
Put 2 as the next digit of the answer. 
Result so far: 13052.162
If we subtract 86 from 120, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 10:
The number 43 fits into 340 7 times, leaving a remainder of 39.
Put 7 as the next digit of the answer. 
Result so far: 13052.1627
Subtracting 301 from 340 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 11:
When dividing 390 by 43, we get 9 with a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 13052.16279
Subtracting 387 from 390 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 12:
43 can be fit into 30 0 times, resulting in a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 13052.16279
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 13:
When dividing 300 by 43, we get 6 with a remainder of 42.
The next digit of our result is 6. 
Result so far: 13052.1627906
Subtract 258 from 300 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 14:
When dividing 420 by 43, we get 9 with a remainder of 33.
Put 9 as the next digit of the answer. 
Result so far: 13052.16279069
Subtract 387 from 420 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

In conclusion, the division gives 13052.16279069 with a balance of 3.3e-08.