638031 ÷ 27 
The aim is to understand the frequency of 27 in 638031.

On to step 1:
27 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 27

Let's proceed to step 2:
If we divide 63 by 27, we get 2 and a remainder of 9.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 9 after subtracting 54 from 63.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 27

Step 3:
When dividing 98 by 27, we get 3 with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
If we subtract 81 from 98, we get 17.
Grab the next digit (0) from the dividend, add it to 17, then carry on: 170 / 27

Going ahead to step 4:
27 can be fit into 170 6 times, resulting in a remainder of 8.
The next digit of our result is 6. 
Result so far: 236.0
If we take 162 away from 170, we end up with 8.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 27

Moving on to step 5:
27 can be fit into 83 3 times, resulting in a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 2363.0
Subtracting 81 from 83 leaves us with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 27

Step 6:
When dividing 21 by 27, we get 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 23630.0
Deduct 0 from 21 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 7:
The number 27 fits into 210 7 times, leaving a remainder of 21.
Use 7 as the next digit of our solution. 
Result so far: 23630.7
Deduct 189 from 210 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 8:
210 divided by 27 is 7 with a remainder of 21.
Put 7 as the next digit of the answer. 
Result so far: 23630.77
Deduct 189 from 210 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

The final result is 23630.77 with a remainder of 0.021.