438393 divided by 43 
The aim is to understand the frequency of 43 in 438393.

Advancing to step 1:
4 divided by 43 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 43

Moving on to step 2:
If we divide 43 by 43, we get 1 and a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 43 from 43, we get 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 43

Advancing to step 3:
8 divided by 43 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtract 0 from 8 to get 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 43

Step 4:
43 goes into 83 1 times with a remainder of 40.
The next digit of our result is 1. 
Result so far: 101.0
Deduct 43 from 83 and we're left with 40.
Bring next digit (9) of the dividend behind the 40 and repeat the process: 409 / 43

Moving on to step 5:
409 divided by 43 is 9 with a remainder of 22.
The number 9 becomes the next digit in our result. 
Result so far: 1019.0
Subtracting 387 from 409 leaves us with 22.
Fetch the next digit (3) from the dividend, attach it to 22 and continue: 223 / 43

Advancing to step 6:
43 can be fit into 223 5 times, resulting in a remainder of 8.
Use 5 as the next digit of our solution. 
Result so far: 10195.0
The remainder is 8 after subtracting 215 from 223.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 7:
80 divided by 43 is 1 with a remainder of 37.
Record the quotient 1 as the next digit in the result. 
Result so far: 10195.1
The remainder is 37 after subtracting 43 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 8:
If we divide 370 by 43, we get 8 and a remainder of 26.
Put 8 as the next digit of the answer. 
Result so far: 10195.18
If we take 344 away from 370, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 9:
260 divided by 43 is 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 10195.186
The remainder is 2 after subtracting 258 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 10:
The number 43 fits into 20 0 times, leaving a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 10195.186
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 11:
When dividing 200 by 43, we get 4 with a remainder of 28.
The number 4 becomes the next digit in our result. 
Result so far: 10195.18604
Deduct 172 from 200 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 12:
If we divide 280 by 43, we get 6 and a remainder of 22.
Record the quotient 6 as the next digit in the result. 
Result so far: 10195.186046
If we take 258 away from 280, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 13:
43 goes into 220 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 10195.1860465
If we subtract 215 from 220, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 14:
43 goes into 50 1 times with a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 10195.18604651
Deduct 43 from 50 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.

The final result is 10195.18604651 with a remainder of 7e-09.