158549 ÷ 43 
The aim is to understand the frequency of 43 in 158549.

Step 1:
When dividing 1 by 43, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 43

Going ahead to step 2:
When dividing 15 by 43, we get 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Bring next digit (8) of the dividend behind the 15 and repeat the process: 158 / 43

Step 3:
The number 43 fits into 158 3 times, leaving a remainder of 29.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 129 from 158 and we're left with 29.
Fetch the next digit (5) from the dividend, attach it to 29 and continue: 295 / 43

On to step 4:
When dividing 295 by 43, we get 6 with a remainder of 37.
The next digit of our result is 6. 
Result so far: 36.0
Subtracting 258 from 295 leaves us with 37.
Fetch the next digit (4) from the dividend, attach it to 37 and continue: 374 / 43

Let's proceed to step 5:
When dividing 374 by 43, we get 8 with a remainder of 30.
The next digit of our result is 8. 
Result so far: 368.0
Subtracting 344 from 374 leaves us with 30.
Bring next digit (9) of the dividend behind the 30 and repeat the process: 309 / 43

On to step 6:
The number 43 fits into 309 7 times, leaving a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 3687.0
The remainder is 8 after subtracting 301 from 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 7:
If we divide 80 by 43, we get 1 and a remainder of 37.
Record the quotient 1 as the next digit in the result. 
Result so far: 3687.1
The remainder is 37 after subtracting 43 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 8:
The number 43 fits into 370 8 times, leaving a remainder of 26.
Put 8 as the next digit of the answer. 
Result so far: 3687.18
Subtract 344 from 370 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 9:
The number 43 fits into 260 6 times, leaving a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 3687.186
The remainder is 2 after subtracting 258 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 10:
43 can be fit into 20 0 times, resulting in a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 3687.186
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 11:
If we divide 200 by 43, we get 4 and a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 3687.18604
Subtracting 172 from 200 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 12:
280 divided by 43 is 6 with a remainder of 22.
The next digit of our result is 6. 
Result so far: 3687.186046
Subtract 258 from 280 to 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.

Let's proceed to step 13:
When dividing 220 by 43, we get 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 3687.1860465
The remainder is 5 after subtracting 215 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 14:
When dividing 50 by 43, we get 1 with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 3687.18604651
The remainder is 7 after subtracting 43 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final outcome is 3687.18604651, with a leftover of 7e-09.