We look at the division of 308025 by 54 
The aim is to understand the frequency of 54 in 308025.

Step 1:
54 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 54

Step 2:
The number 54 fits into 30 0 times, leaving a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 30 after subtracting 0 from 30.
Include the next digit (8) from the dividend after 30, then repeat: 308 / 54

Advancing to step 3:
When dividing 308 by 54, we get 5 with a remainder of 38.
Write down 5 as next digit of the result. 
Result so far: 5.0
The remainder is 38 after subtracting 270 from 308.
Fetch the next digit (0) from the dividend, attach it to 38 and continue: 380 / 54

On to step 4:
When dividing 380 by 54, we get 7 with a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 57.0
The remainder is 2 after subtracting 378 from 380.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 54

Advancing to step 5:
The number 54 fits into 22 0 times, leaving a remainder of 22.
Use 0 as the next digit of our solution. 
Result so far: 570.0
The remainder is 22 after subtracting 0 from 22.
Include the next digit (5) from the dividend after 22, then repeat: 225 / 54

On to step 6:
54 can be fit into 225 4 times, resulting in a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 5704.0
If we subtract 216 from 225, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
54 can be fit into 90 1 times, resulting in a remainder of 36.
Record the quotient 1 as the next digit in the result. 
Result so far: 5704.1
If we take 54 away from 90, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 8:
When dividing 360 by 54, we get 6 with a remainder of 36.
The number 6 becomes the next digit in our result. 
Result so far: 5704.16
Deduct 324 from 360 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 9:
The number 54 fits into 360 6 times, leaving a remainder of 36.
The next digit of our result is 6. 
Result so far: 5704.166
Subtracting 324 from 360 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final result is 5704.166 with a remainder of 0.0036.