We look at the division of 669 by 27 
The aim is to understand the frequency of 27 in 669.

Let's proceed to step 1:
If we divide 6 by 27, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 27

Let's proceed to step 2:
When dividing 66 by 27, we get 2 with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 54 from 66, we get 12.
Fetch the next digit (9) from the dividend, attach it to 12 and continue: 129 / 27

Advancing to step 3:
27 goes into 129 4 times with a remainder of 21.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
Deduct 108 from 129 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.

On to step 4:
210 divided by 27 is 7 with a remainder of 21.
The next digit of our result is 7. 
Result so far: 24.7
If we subtract 189 from 210, we get 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 5:
The number 27 fits into 210 7 times, leaving a remainder of 21.
The number 7 becomes the next digit in our result. 
Result so far: 24.77
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 outcome is 24.77, with a leftover of 0.021.