868623 divided by 18 
The aim is to understand the frequency of 18 in 868623.

Step 1:
18 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 18

Going ahead to step 2:
18 can be fit into 86 4 times, resulting in a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 72 from 86, we get 14.
Fetch the next digit (8) from the dividend, attach it to 14 and continue: 148 / 18

Going ahead to step 3:
18 can be fit into 148 8 times, resulting in a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 48.0
Subtracting 144 from 148 leaves us with 4.
Append the next digit (6) from the dividend to 4 and continue with: 46 / 18

Let's proceed to step 4:
18 goes into 46 2 times with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 482.0
Deduct 36 from 46 and we're left with 10.
Bring next digit (2) of the dividend behind the 10 and repeat the process: 102 / 18

Advancing to step 5:
When dividing 102 by 18, we get 5 with a remainder of 12.
Put 5 as the next digit of the answer. 
Result so far: 4825.0
Deduct 90 from 102 and we're left with 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 18

Step 6:
18 goes into 123 6 times with a remainder of 15.
Use 6 as the next digit of our solution. 
Result so far: 48256.0
Deduct 108 from 123 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
18 can be fit into 150 8 times, resulting in a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 48256.8
Deduct 144 from 150 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
60 divided by 18 is 3 with a remainder of 6.
The next digit of our result is 3. 
Result so far: 48256.83
Subtracting 54 from 60 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 9:
The number 18 fits into 60 3 times, leaving a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 48256.833
Deduct 54 from 60 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The quotient of the division is 48256.833, and the remainder is 0.0006.