We're dividing 742951 by 18 
The aim is to understand the frequency of 18 in 742951.

Step 1:
The number 18 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 18

Advancing to step 2:
18 can be fit into 74 4 times, resulting in a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 72 from 74 leaves us with 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 18

Let's proceed to step 3:
22 divided by 18 is 1 with a remainder of 4.
The next digit of our result is 1. 
Result so far: 41.0
Subtracting 18 from 22 leaves us with 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 18

Going ahead to step 4:
The number 18 fits into 49 2 times, leaving a remainder of 13.
Put 2 as the next digit of the answer. 
Result so far: 412.0
The remainder is 13 after subtracting 36 from 49.
Take the next digit (5) from the dividend and append it to 13, then repeat: 135 / 18

Moving on to step 5:
The number 18 fits into 135 7 times, leaving a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 4127.0
If we take 126 away from 135, we end up with 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 18

Moving on to step 6:
The number 18 fits into 91 5 times, leaving a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 41275.0
The remainder is 1 after subtracting 90 from 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
The number 18 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 41275.0
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
18 goes into 100 5 times with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 41275.05
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 9:
18 can be fit into 100 5 times, resulting in a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 41275.055
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The quotient of the division is 41275.055, and the remainder is 0.001.