391235 divided by 43 
The aim is to understand the frequency of 43 in 391235.

Going ahead to step 1:
43 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 43

Advancing to step 2:
43 goes into 39 0 times with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Grab the next digit (1) from the dividend, add it to 39, then carry on: 391 / 43

Advancing to step 3:
If we divide 391 by 43, we get 9 and a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
The remainder is 4 after subtracting 387 from 391.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 43

On to step 4:
43 goes into 42 0 times with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 90.0
Subtract 0 from 42 to get 42.
Grab the next digit (3) from the dividend, add it to 42, then carry on: 423 / 43

On to step 5:
43 can be fit into 423 9 times, resulting in a remainder of 36.
Put 9 as the next digit of the answer. 
Result so far: 909.0
Subtracting 387 from 423 leaves us with 36.
Take the next digit (5) from the dividend and append it to 36, then repeat: 365 / 43

On to step 6:
43 goes into 365 8 times with a remainder of 21.
Record the quotient 8 as the next digit in the result. 
Result so far: 9098.0
If we subtract 344 from 365, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 7:
210 divided by 43 is 4 with a remainder of 38.
Use 4 as the next digit of our solution. 
Result so far: 9098.4
If we subtract 172 from 210, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 8:
380 divided by 43 is 8 with a remainder of 36.
The number 8 becomes the next digit in our result. 
Result so far: 9098.48
The remainder is 36 after subtracting 344 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 9:
If we divide 360 by 43, we get 8 and a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 9098.488
Deduct 344 from 360 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 9098.488, with a leftover of 0.0016.