25854873 ÷ 54 
The aim is to understand the frequency of 54 in 25854873.

Let's proceed to step 1:
If we divide 2 by 54, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 54

Going ahead to step 2:
54 goes into 25 0 times with a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 25 after subtracting 0 from 25.
Include the next digit (8) from the dividend after 25, then repeat: 258 / 54

Moving on to step 3:
If we divide 258 by 54, we get 4 and a remainder of 42.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 216 from 258 to get 42.
Bring next digit (5) of the dividend behind the 42 and repeat the process: 425 / 54

Let's proceed to step 4:
When dividing 425 by 54, we get 7 with a remainder of 47.
Record the quotient 7 as the next digit in the result. 
Result so far: 47.0
If we subtract 378 from 425, we get 47.
Append the next digit (4) from the dividend to 47 and continue with: 474 / 54

Going ahead to step 5:
54 goes into 474 8 times with a remainder of 42.
Record the quotient 8 as the next digit in the result. 
Result so far: 478.0
Subtract 432 from 474 to get 42.
Take the next digit (8) from the dividend and append it to 42, then repeat: 428 / 54

Advancing to step 6:
54 can be fit into 428 7 times, resulting in a remainder of 50.
Write down 7 as next digit of the result. 
Result so far: 4787.0
Subtracting 378 from 428 leaves us with 50.
Grab the next digit (7) from the dividend, add it to 50, then carry on: 507 / 54

Step 7:
If we divide 507 by 54, we get 9 and a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 47879.0
Subtracting 486 from 507 leaves us with 21.
Take the next digit (3) from the dividend and append it to 21, then repeat: 213 / 54

Let's proceed to step 8:
54 can be fit into 213 3 times, resulting in a remainder of 51.
The number 3 becomes the next digit in our result. 
Result so far: 478793.0
The remainder is 51 after subtracting 162 from 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Step 9:
54 goes into 510 9 times with a remainder of 24.
Put 9 as the next digit of the answer. 
Result so far: 478793.9
Subtract 486 from 510 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 10:
54 goes into 240 4 times with a remainder of 24.
Record the quotient 4 as the next digit in the result. 
Result so far: 478793.94
Subtracting 216 from 240 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 11:
54 can be fit into 240 4 times, resulting in a remainder of 24.
Write down 4 as next digit of the result. 
Result so far: 478793.944
If we take 216 away from 240, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final result is 478793.944 with a remainder of 0.0024.