963173 ÷ 18 
The aim is to understand the frequency of 18 in 963173.

Step 1:
The number 18 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Include the next digit (6) from the dividend after 9, then repeat: 96 / 18

Let's proceed to step 2:
18 goes into 96 5 times with a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Deduct 90 from 96 and we're left with 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 18

Moving on to step 3:
When dividing 63 by 18, we get 3 with a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 53.0
Subtracting 54 from 63 leaves us with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 18

Moving on to step 4:
91 divided by 18 is 5 with a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 535.0
The remainder is 1 after subtracting 90 from 91.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 18

Step 5:
If we divide 17 by 18, we get 0 and a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 5350.0
If we subtract 0 from 17, we get 17.
Bring next digit (3) of the dividend behind the 17 and repeat the process: 173 / 18

Step 6:
18 can be fit into 173 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 53509.0
If we subtract 162 from 173, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 7:
When dividing 110 by 18, we get 6 with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 53509.6
Subtracting 108 from 110 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
18 can be fit into 20 1 times, resulting in a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 53509.61
Deduct 18 from 20 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 9:
20 divided by 18 is 1 with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 53509.611
If we subtract 18 from 20, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 53509.611 with a remainder of 0.0002.