386689 ÷ 43 
The aim is to understand the frequency of 43 in 386689.

Moving on to step 1:
The number 43 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 43

Advancing to step 2:
43 goes into 38 0 times with a remainder of 38.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 38 to get 38.
Grab the next digit (6) from the dividend, add it to 38, then carry on: 386 / 43

Step 3:
When dividing 386 by 43, we get 8 with a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 344 from 386, we get 42.
Take the next digit (6) from the dividend and append it to 42, then repeat: 426 / 43

Advancing to step 4:
426 divided by 43 is 9 with a remainder of 39.
The number 9 becomes the next digit in our result. 
Result so far: 89.0
Deduct 387 from 426 and we're left with 39.
Take the next digit (8) from the dividend and append it to 39, then repeat: 398 / 43

Step 5:
43 goes into 398 9 times with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 899.0
Deduct 387 from 398 and we're left with 11.
Fetch the next digit (9) from the dividend, attach it to 11 and continue: 119 / 43

Step 6:
The number 43 fits into 119 2 times, leaving a remainder of 33.
Record the quotient 2 as the next digit in the result. 
Result so far: 8992.0
Subtracting 86 from 119 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 7:
330 divided by 43 is 7 with a remainder of 29.
Put 7 as the next digit of the answer. 
Result so far: 8992.7
Deduct 301 from 330 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 8:
43 can be fit into 290 6 times, resulting in a remainder of 32.
Record the quotient 6 as the next digit in the result. 
Result so far: 8992.76
Deduct 258 from 290 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 9:
43 goes into 320 7 times with a remainder of 19.
The number 7 becomes the next digit in our result. 
Result so far: 8992.767
Deduct 301 from 320 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 10:
If we divide 190 by 43, we get 4 and a remainder of 18.
Record the quotient 4 as the next digit in the result. 
Result so far: 8992.7674
If we subtract 172 from 190, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 11:
43 can be fit into 180 4 times, resulting in a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 8992.76744
The remainder is 8 after subtracting 172 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 8992.76744, with a leftover of 8e-06.