We're dividing 263815 by 43 
The aim is to understand the frequency of 43 in 263815.

Step 1:
The number 43 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 43

Advancing to step 2:
26 divided by 43 is 0 with a remainder of 26.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 26, we end up with 26.
Grab the next digit (3) from the dividend, add it to 26, then carry on: 263 / 43

Step 3:
43 can be fit into 263 6 times, resulting in a remainder of 5.
The next digit of our result is 6. 
Result so far: 6.0
Subtracting 258 from 263 leaves us with 5.
Append the next digit (8) from the dividend to 5 and continue with: 58 / 43

On to step 4:
When dividing 58 by 43, we get 1 with a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 61.0
The remainder is 15 after subtracting 43 from 58.
Append the next digit (1) from the dividend to 15 and continue with: 151 / 43

Step 5:
The number 43 fits into 151 3 times, leaving a remainder of 22.
Use 3 as the next digit of our solution. 
Result so far: 613.0
Deduct 129 from 151 and we're left with 22.
Include the next digit (5) from the dividend after 22, then repeat: 225 / 43

Let's proceed to step 6:
225 divided by 43 is 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 6135.0
The remainder is 10 after subtracting 215 from 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 7:
100 divided by 43 is 2 with a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 6135.2
Subtract 86 from 100 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
If we divide 140 by 43, we get 3 and a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 6135.23
Deduct 129 from 140 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 9:
43 can be fit into 110 2 times, resulting in a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 6135.232
Deduct 86 from 110 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 10:
If we divide 240 by 43, we get 5 and a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 6135.2325
Subtract 215 from 240 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 11:
43 can be fit into 250 5 times, resulting in a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 6135.23255
If we take 215 away from 250, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final outcome is 6135.23255, with a leftover of 3.5e-05.