We divide 426859 by 18
The aim is to understand the frequency of 18 in 426859.

Let's proceed to step 1:
The number 18 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 18

Advancing to step 2:
The number 18 fits into 42 2 times, leaving a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 36 away from 42, we end up with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 18

Advancing to step 3:
18 goes into 66 3 times with a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 23.0
If we take 54 away from 66, we end up with 12.
Bring next digit (8) of the dividend behind the 12 and repeat the process: 128 / 18

Step 4:
18 goes into 128 7 times with a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 237.0
If we take 126 away from 128, we end up with 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 18

Going ahead to step 5:
25 divided by 18 is 1 with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 2371.0
The remainder is 7 after subtracting 18 from 25.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 18

Let's proceed to step 6:
When dividing 79 by 18, we get 4 with a remainder of 7.
The next digit of our result is 4. 
Result so far: 23714.0
The remainder is 7 after subtracting 72 from 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
18 can be fit into 70 3 times, resulting in a remainder of 16.
Write down 3 as next digit of the result. 
Result so far: 23714.3
Subtracting 54 from 70 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 8:
18 can be fit into 160 8 times, resulting in a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 23714.38
If we subtract 144 from 160, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 9:
18 goes into 160 8 times with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 23714.388
Deduct 144 from 160 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The quotient of the division is 23714.388, and the remainder is 0.0016.