We look at the division of 45454540 by 54 
The aim is to understand the frequency of 54 in 45454540.

Step 1:
If we divide 4 by 54, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 54

On to step 2:
45 divided by 54 is 0 with a remainder of 45.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 45, we end up with 45.
Fetch the next digit (4) from the dividend, attach it to 45 and continue: 454 / 54

Advancing to step 3:
When dividing 454 by 54, we get 8 with a remainder of 22.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtracting 432 from 454 leaves us with 22.
Fetch the next digit (5) from the dividend, attach it to 22 and continue: 225 / 54

On to step 4:
225 divided by 54 is 4 with a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 84.0
The remainder is 9 after subtracting 216 from 225.
Take the next digit (4) from the dividend and append it to 9, then repeat: 94 / 54

Step 5:
If we divide 94 by 54, we get 1 and a remainder of 40.
Put 1 as the next digit of the answer. 
Result so far: 841.0
Subtract 54 from 94 to get 40.
Bring next digit (5) of the dividend behind the 40 and repeat the process: 405 / 54

Step 6:
If we divide 405 by 54, we get 7 and a remainder of 27.
Use 7 as the next digit of our solution. 
Result so far: 8417.0
The remainder is 27 after subtracting 378 from 405.
Include the next digit (4) from the dividend after 27, then repeat: 274 / 54

Moving on to step 7:
54 goes into 274 5 times with a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 84175.0
The remainder is 4 after subtracting 270 from 274.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 54

Moving on to step 8:
54 can be fit into 40 0 times, resulting in a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 841750.0
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 9:
If we divide 400 by 54, we get 7 and a remainder of 22.
Put 7 as the next digit of the answer. 
Result so far: 841750.7
If we take 378 away from 400, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 10:
220 divided by 54 is 4 with a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 841750.74
Subtracting 216 from 220 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 11:
40 divided by 54 is 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 841750.74
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 12:
When dividing 400 by 54, we get 7 with a remainder of 22.
The number 7 becomes the next digit in our result. 
Result so far: 841750.7407
If we subtract 378 from 400, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 13:
54 goes into 220 4 times with a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 841750.74074
If we take 216 away from 220, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 14:
The number 54 fits into 40 0 times, leaving a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 841750.74074
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 15:
If we divide 400 by 54, we get 7 and a remainder of 22.
Use 7 as the next digit of our solution. 
Result so far: 841750.7407407
The remainder is 22 after subtracting 378 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 16:
54 can be fit into 220 4 times, resulting in a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 841750.74074074
Subtracting 216 from 220 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 841750.74074074 with a remainder of 4e-09.