We divide 748721 by 18
The aim is to understand the frequency of 18 in 748721.

Moving on to step 1:
The number 18 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 18

Let's proceed to step 2:
18 can be fit into 74 4 times, resulting in a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 72 from 74 leaves us with 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 18

Let's proceed to step 3:
When dividing 28 by 18, we get 1 with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 41.0
If we subtract 18 from 28, we get 10.
Grab the next digit (7) from the dividend, add it to 10, then carry on: 107 / 18

Going ahead to step 4:
The number 18 fits into 107 5 times, leaving a remainder of 17.
Put 5 as the next digit of the answer. 
Result so far: 415.0
The remainder is 17 after subtracting 90 from 107.
Include the next digit (2) from the dividend after 17, then repeat: 172 / 18

On to step 5:
18 goes into 172 9 times with a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 4159.0
The remainder is 10 after subtracting 162 from 172.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 18

Going ahead to step 6:
18 goes into 101 5 times with a remainder of 11.
Write down 5 as next digit of the result. 
Result so far: 41595.0
If we take 90 away from 101, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
The number 18 fits into 110 6 times, leaving a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 41595.6
If we subtract 108 from 110, 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.

Step 8:
When dividing 20 by 18, we get 1 with a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 41595.61
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.

Going ahead to step 9:
18 goes into 20 1 times with a remainder of 2.
The next digit of our result is 1. 
Result so far: 41595.611
Subtract 18 from 20 to 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 41595.611 with a remainder of 0.0002.