We divide 344673 by 18
The aim is to understand the frequency of 18 in 344673.

On to step 1:
The number 18 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 18

Let's proceed to step 2:
34 divided by 18 is 1 with a remainder of 16.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 18 from 34 to get 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 18

On to step 3:
18 goes into 164 9 times with a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 19.0
If we subtract 162 from 164, we get 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 18

On to step 4:
18 can be fit into 26 1 times, resulting in a remainder of 8.
The next digit of our result is 1. 
Result so far: 191.0
Subtract 18 from 26 to get 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 18

Moving on to step 5:
When dividing 87 by 18, we get 4 with a remainder of 15.
Record the quotient 4 as the next digit in the result. 
Result so far: 1914.0
If we subtract 72 from 87, we get 15.
Grab the next digit (3) from the dividend, add it to 15, then carry on: 153 / 18

Moving on to step 6:
The number 18 fits into 153 8 times, leaving a remainder of 9.
Put 8 as the next digit of the answer. 
Result so far: 19148.0
If we take 144 away from 153, we end up 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.

Going ahead to step 7:
90 divided by 18 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 19148.5
The remainder is 0 after subtracting 90 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
18 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 19148.5
If we subtract 0 from 0, we 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.

On to step 9:
The number 18 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 19148.5
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.

The final result is 19148.5 with a remainder of 0.0.