We look at the division of 416091 by 54 
The aim is to understand the frequency of 54 in 416091.

Moving on to step 1:
When dividing 4 by 54, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 54

Going ahead to step 2:
When dividing 41 by 54, we get 0 with a remainder of 41.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 41 to get 41.
Include the next digit (6) from the dividend after 41, then repeat: 416 / 54

Let's proceed to step 3:
416 divided by 54 is 7 with a remainder of 38.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we take 378 away from 416, we end up with 38.
Append the next digit (0) from the dividend to 38 and continue with: 380 / 54

Advancing to step 4:
If we divide 380 by 54, we get 7 and a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 77.0
The remainder is 2 after subtracting 378 from 380.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 54

On to step 5:
29 divided by 54 is 0 with a remainder of 29.
Put 0 as the next digit of the answer. 
Result so far: 770.0
If we subtract 0 from 29, we get 29.
Include the next digit (1) from the dividend after 29, then repeat: 291 / 54

On to step 6:
If we divide 291 by 54, we get 5 and a remainder of 21.
Record the quotient 5 as the next digit in the result. 
Result so far: 7705.0
Subtract 270 from 291 to 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.

On to step 7:
54 can be fit into 210 3 times, resulting in a remainder of 48.
Record the quotient 3 as the next digit in the result. 
Result so far: 7705.3
Subtract 162 from 210 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 8:
54 goes into 480 8 times with a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 7705.38
Subtract 432 from 480 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 9:
480 divided by 54 is 8 with a remainder of 48.
Use 8 as the next digit of our solution. 
Result so far: 7705.388
Subtract 432 from 480 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final outcome is 7705.388, with a leftover of 0.0048.