We're dividing 909209 by 43 
The aim is to understand the frequency of 43 in 909209.

On to step 1:
43 can be fit into 9 0 times, resulting in a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 43

Moving on to step 2:
When dividing 90 by 43, we get 2 with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 4 after subtracting 86 from 90.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 43

Advancing to step 3:
The number 43 fits into 49 1 times, leaving a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
The remainder is 6 after subtracting 43 from 49.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 43

Moving on to step 4:
62 divided by 43 is 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 211.0
Subtract 43 from 62 to get 19.
Append the next digit (0) from the dividend to 19 and continue with: 190 / 43

Advancing to step 5:
43 can be fit into 190 4 times, resulting in a remainder of 18.
The number 4 becomes the next digit in our result. 
Result so far: 2114.0
Subtracting 172 from 190 leaves us with 18.
Include the next digit (9) from the dividend after 18, then repeat: 189 / 43

Advancing to step 6:
43 can be fit into 189 4 times, resulting in a remainder of 17.
The number 4 becomes the next digit in our result. 
Result so far: 21144.0
If we subtract 172 from 189, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 7:
If we divide 170 by 43, we get 3 and a remainder of 41.
Write down 3 as next digit of the result. 
Result so far: 21144.3
If we subtract 129 from 170, we get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 8:
When dividing 410 by 43, we get 9 with a remainder of 23.
The next digit of our result is 9. 
Result so far: 21144.39
Subtracting 387 from 410 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 9:
43 goes into 230 5 times with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 21144.395
If we take 215 away from 230, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 10:
When dividing 150 by 43, we get 3 with a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 21144.3953
Subtracting 129 from 150 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 11:
43 can be fit into 210 4 times, resulting in a remainder of 38.
Write down 4 as next digit of the result. 
Result so far: 21144.39534
If we take 172 away from 210, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 12:
If we divide 380 by 43, we get 8 and a remainder of 36.
Write down 8 as next digit of the result. 
Result so far: 21144.395348
Deduct 344 from 380 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 13:
When dividing 360 by 43, we get 8 with a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 21144.3953488
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.

Our division results in 21144.3953488 with a remaining 1.6e-07.