We're dividing 43945374 by 18 
The aim is to understand the frequency of 18 in 43945374.

Step 1:
The number 18 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 18

Going ahead to step 2:
When dividing 43 by 18, we get 2 with a remainder of 7.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 36 away from 43, we end up with 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 18

Let's proceed to step 3:
79 divided by 18 is 4 with a remainder of 7.
Use 4 as the next digit of our solution. 
Result so far: 24.0
If we subtract 72 from 79, we get 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 18

Going ahead to step 4:
The number 18 fits into 74 4 times, leaving a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 244.0
Subtract 72 from 74 to get 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 18

Moving on to step 5:
18 goes into 25 1 times with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 2441.0
The remainder is 7 after subtracting 18 from 25.
Grab the next digit (3) from the dividend, add it to 7, then carry on: 73 / 18

Step 6:
18 can be fit into 73 4 times, resulting in a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 24414.0
Subtracting 72 from 73 leaves us with 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 18

Advancing to step 7:
The number 18 fits into 17 0 times, leaving a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 244140.0
If we take 0 away from 17, we end up with 17.
Grab the next digit (4) from the dividend, add it to 17, then carry on: 174 / 18

On to step 8:
When dividing 174 by 18, we get 9 with a remainder of 12.
Write down 9 as next digit of the result. 
Result so far: 2441409.0
Subtract 162 from 174 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 9:
18 goes into 120 6 times with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 2441409.6
Subtract 108 from 120 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 10:
If we divide 120 by 18, we get 6 and a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 2441409.66
If we take 108 away from 120, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The quotient of the division is 2441409.66, and the remainder is 0.012.