We're dividing 644363 by 43 
The aim is to understand the frequency of 43 in 644363.

Advancing to step 1:
6 divided by 43 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 43

Advancing to step 2:
64 divided by 43 is 1 with a remainder of 21.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 43 from 64 to get 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 43

Advancing to step 3:
If we divide 214 by 43, we get 4 and a remainder of 42.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
If we take 172 away from 214, we end up with 42.
Fetch the next digit (3) from the dividend, attach it to 42 and continue: 423 / 43

Step 4:
43 goes into 423 9 times with a remainder of 36.
Write down 9 as next digit of the result. 
Result so far: 149.0
Deduct 387 from 423 and we're left with 36.
Append the next digit (6) from the dividend to 36 and continue with: 366 / 43

On to step 5:
When dividing 366 by 43, we get 8 with a remainder of 22.
The next digit of our result is 8. 
Result so far: 1498.0
Deduct 344 from 366 and we're left with 22.
Include the next digit (3) from the dividend after 22, then repeat: 223 / 43

Moving on to step 6:
When dividing 223 by 43, we get 5 with a remainder of 8.
Put 5 as the next digit of the answer. 
Result so far: 14985.0
Subtract 215 from 223 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 7:
43 goes into 80 1 times with a remainder of 37.
The number 1 becomes the next digit in our result. 
Result so far: 14985.1
If we take 43 away from 80, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 8:
370 divided by 43 is 8 with a remainder of 26.
The number 8 becomes the next digit in our result. 
Result so far: 14985.18
The remainder is 26 after subtracting 344 from 370.
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:
The number 43 fits into 260 6 times, leaving a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 14985.186
If we take 258 away from 260, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving 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: 14985.186
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 11:
43 goes into 200 4 times with a remainder of 28.
Write down 4 as next digit of the result. 
Result so far: 14985.18604
Subtract 172 from 200 to get 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:
43 can be fit into 280 6 times, resulting in a remainder of 22.
Use 6 as the next digit of our solution. 
Result so far: 14985.186046
If we subtract 258 from 280, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 13:
220 divided by 43 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 14985.1860465
Subtract 215 from 220 to 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.

On to step 14:
50 divided by 43 is 1 with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 14985.18604651
Subtract 43 from 50 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

In conclusion, the division gives 14985.18604651 with a balance of 7e-09.