We divide 375999 by 18
The aim is to understand the frequency of 18 in 375999.

On to step 1:
18 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (7) from the dividend to 3 and continue with: 37 / 18

Going ahead to step 2:
When dividing 37 by 18, we get 2 with a remainder of 1.
The next digit of our result is 2. 
Result so far: 2.0
If we take 36 away from 37, we end up with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 18

Step 3:
The number 18 fits into 15 0 times, leaving a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
If we take 0 away from 15, we end up with 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 18

Advancing to step 4:
18 goes into 159 8 times with a remainder of 15.
Put 8 as the next digit of the answer. 
Result so far: 208.0
If we take 144 away from 159, we end up with 15.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 18

Advancing to step 5:
The number 18 fits into 159 8 times, leaving a remainder of 15.
Use 8 as the next digit of our solution. 
Result so far: 2088.0
Deduct 144 from 159 and we're left with 15.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 18

Let's proceed to step 6:
18 can be fit into 159 8 times, resulting in a remainder of 15.
Put 8 as the next digit of the answer. 
Result so far: 20888.0
If we take 144 away from 159, 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.

Let's proceed to step 7:
When dividing 150 by 18, we get 8 with a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 20888.8
Deduct 144 from 150 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.

Advancing to step 8:
18 goes into 60 3 times with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 20888.83
Subtracting 54 from 60 leaves us 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.

Step 9:
If we divide 60 by 18, we get 3 and a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 20888.833
Subtracting 54 from 60 leaves us 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.

In conclusion, the division gives 20888.833 with a balance of 0.0006.