We look at the division of 12155226 by 54 
The aim is to understand the frequency of 54 in 12155226.

On to step 1:
If we divide 1 by 54, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 54

Advancing to step 2:
54 goes into 12 0 times with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 54

On to step 3:
54 can be fit into 121 2 times, resulting in a remainder of 13.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 108 from 121 to get 13.
Append the next digit (5) from the dividend to 13 and continue with: 135 / 54

Going ahead to step 4:
When dividing 135 by 54, we get 2 with a remainder of 27.
The next digit of our result is 2. 
Result so far: 22.0
If we take 108 away from 135, we end up with 27.
Include the next digit (5) from the dividend after 27, then repeat: 275 / 54

Let's proceed to step 5:
When dividing 275 by 54, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 225.0
If we take 270 away from 275, we end up with 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 54

Let's proceed to step 6:
The number 54 fits into 52 0 times, leaving a remainder of 52.
Record the quotient 0 as the next digit in the result. 
Result so far: 2250.0
If we subtract 0 from 52, we get 52.
Fetch the next digit (2) from the dividend, attach it to 52 and continue: 522 / 54

Let's proceed to step 7:
When dividing 522 by 54, we get 9 with a remainder of 36.
The next digit of our result is 9. 
Result so far: 22509.0
Subtracting 486 from 522 leaves us with 36.
Append the next digit (6) from the dividend to 36 and continue with: 366 / 54

Moving on to step 8:
If we divide 366 by 54, we get 6 and a remainder of 42.
The number 6 becomes the next digit in our result. 
Result so far: 225096.0
Subtract 324 from 366 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 9:
If we divide 420 by 54, we get 7 and a remainder of 42.
Record the quotient 7 as the next digit in the result. 
Result so far: 225096.7
Deduct 378 from 420 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 10:
420 divided by 54 is 7 with a remainder of 42.
Use 7 as the next digit of our solution. 
Result so far: 225096.77
If we take 378 away from 420, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Our division results in 225096.77 with a remaining 0.042.