We divide 574445 by 18
The aim is to understand the frequency of 18 in 574445.

Let's proceed to step 1:
18 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 18

Let's proceed to step 2:
The number 18 fits into 57 3 times, leaving a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 54 from 57, we get 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 18

Advancing to step 3:
The number 18 fits into 34 1 times, leaving a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 31.0
If we take 18 away from 34, we end up with 16.
Include the next digit (4) from the dividend after 16, then repeat: 164 / 18

Moving on to step 4:
18 goes into 164 9 times with a remainder of 2.
The next digit of our result is 9. 
Result so far: 319.0
Deduct 162 from 164 and we're left with 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 18

On to step 5:
When dividing 24 by 18, we get 1 with a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 3191.0
The remainder is 6 after subtracting 18 from 24.
Grab the next digit (5) from the dividend, add it to 6, then carry on: 65 / 18

Let's proceed to step 6:
65 divided by 18 is 3 with a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 31913.0
Deduct 54 from 65 and we're left 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.

Let's proceed to step 7:
If we divide 110 by 18, we get 6 and a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 31913.6
If we take 108 away from 110, we end up 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:
If we divide 20 by 18, we get 1 and a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 31913.61
Subtracting 18 from 20 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.

Moving on to step 9:
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: 31913.611
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.

After the division, we end up with 31913.611 and a remainder of 0.0002.