626646 ÷ 18 
The aim is to understand the frequency of 18 in 626646.

On to step 1:
If we divide 6 by 18, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (2) from the dividend and append it to 6, then repeat: 62 / 18

Step 2:
18 goes into 62 3 times with a remainder of 8.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 8 after subtracting 54 from 62.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 18

Advancing to step 3:
The number 18 fits into 86 4 times, leaving a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 34.0
The remainder is 14 after subtracting 72 from 86.
Take the next digit (6) from the dividend and append it to 14, then repeat: 146 / 18

Step 4:
The number 18 fits into 146 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 348.0
If we subtract 144 from 146, we get 2.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 18

Moving on to step 5:
18 goes into 24 1 times with a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 3481.0
If we take 18 away from 24, we end up with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 18

On to step 6:
18 can be fit into 66 3 times, resulting in a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 34813.0
Deduct 54 from 66 and we're left 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.

Step 7:
18 goes into 120 6 times with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 34813.6
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 8:
The number 18 fits into 120 6 times, leaving a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 34813.66
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.

The final outcome is 34813.66, with a leftover of 0.012.