We look at the division of 189991 by 43 
The aim is to understand the frequency of 43 in 189991.

Moving on to step 1:
1 divided by 43 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 43

Advancing to step 2:
If we divide 18 by 43, we get 0 and a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 18 after subtracting 0 from 18.
Append the next digit (9) from the dividend to 18 and continue with: 189 / 43

Let's proceed to step 3:
When dividing 189 by 43, we get 4 with a remainder of 17.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 172 from 189 to get 17.
Include the next digit (9) from the dividend after 17, then repeat: 179 / 43

Let's proceed to step 4:
43 can be fit into 179 4 times, resulting in a remainder of 7.
Write down 4 as next digit of the result. 
Result so far: 44.0
The remainder is 7 after subtracting 172 from 179.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 43

Let's proceed to step 5:
79 divided by 43 is 1 with a remainder of 36.
The next digit of our result is 1. 
Result so far: 441.0
Subtract 43 from 79 to get 36.
Bring next digit (1) of the dividend behind the 36 and repeat the process: 361 / 43

Moving on to step 6:
361 divided by 43 is 8 with a remainder of 17.
Use 8 as the next digit of our solution. 
Result so far: 4418.0
Subtract 344 from 361 to 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.

Step 7:
When dividing 170 by 43, we get 3 with a remainder of 41.
Write down 3 as next digit of the result. 
Result so far: 4418.3
Subtract 129 from 170 to 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.

Step 8:
43 goes into 410 9 times with a remainder of 23.
Use 9 as the next digit of our solution. 
Result so far: 4418.39
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.

Advancing to step 9:
230 divided by 43 is 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 4418.395
Deduct 215 from 230 and we're left 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:
If we divide 150 by 43, we get 3 and a remainder of 21.
Put 3 as the next digit of the answer. 
Result so far: 4418.3953
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.
Put 4 as the next digit of the answer. 
Result so far: 4418.39534
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.

On to step 12:
380 divided by 43 is 8 with a remainder of 36.
Use 8 as the next digit of our solution. 
Result so far: 4418.395348
If we take 344 away from 380, we end up 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.

Let's proceed to step 13:
360 divided by 43 is 8 with a remainder of 16.
The next digit of our result is 8. 
Result so far: 4418.3953488
Subtracting 344 from 360 leaves us 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 4418.3953488 with a remaining 1.6e-07.