43845 ÷ 9 
The aim is to understand the frequency of 9 in 43845.

Let's proceed to step 1:
If we divide 4 by 9, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 9

Moving on to step 2:
The number 9 fits into 43 4 times, leaving a remainder of 7.
The next digit of our result is 4. 
Result so far: 4.0
Subtracting 36 from 43 leaves us with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 9

On to step 3:
9 can be fit into 78 8 times, resulting in a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 48.0
Deduct 72 from 78 and we're left with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 9

On to step 4:
9 can be fit into 64 7 times, resulting in a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 487.0
The remainder is 1 after subtracting 63 from 64.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 9

Going ahead to step 5:
15 divided by 9 is 1 with a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 4871.0
If we subtract 9 from 15, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 6:
If we divide 60 by 9, we get 6 and a remainder of 6.
Write down 6 as next digit of the result. 
Result so far: 4871.6
Deduct 54 from 60 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
60 divided by 9 is 6 with a remainder of 6.
Write down 6 as next digit of the result. 
Result so far: 4871.66
If we subtract 54 from 60, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

After the division, we end up with 4871.66 and a remainder of 0.006.