Let's divide 774243 by 18
The aim is to understand the frequency of 18 in 774243.

Moving on to step 1:
18 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 18

On to step 2:
The number 18 fits into 77 4 times, leaving a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 72 from 77 to get 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 18

Going ahead to step 3:
54 divided by 18 is 3 with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
Subtract 54 from 54 to get 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 18

Going ahead to step 4:
2 divided by 18 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 430.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 18

Advancing to step 5:
18 can be fit into 24 1 times, resulting in a remainder of 6.
Put 1 as the next digit of the answer. 
Result so far: 4301.0
Deduct 18 from 24 and we're left with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 18

Advancing to step 6:
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: 43013.0
Deduct 54 from 63 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
The number 18 fits into 90 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 43013.5
If we take 90 away from 90, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
18 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 43013.5
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
18 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 43013.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 43013.5 with a remainder of 0.0.