351604 divided by 54 
The aim is to understand the frequency of 54 in 351604.

Going ahead to step 1:
If we divide 3 by 54, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 54

On to step 2:
When dividing 35 by 54, we get 0 with a remainder of 35.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 35 and we're left with 35.
Take the next digit (1) from the dividend and append it to 35, then repeat: 351 / 54

On to step 3:
351 divided by 54 is 6 with a remainder of 27.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 27 after subtracting 324 from 351.
Fetch the next digit (6) from the dividend, attach it to 27 and continue: 276 / 54

Step 4:
When dividing 276 by 54, we get 5 with a remainder of 6.
Use 5 as the next digit of our solution. 
Result so far: 65.0
The remainder is 6 after subtracting 270 from 276.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 54

Let's proceed to step 5:
When dividing 60 by 54, we get 1 with a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 651.0
Subtract 54 from 60 to get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 54

Going ahead to step 6:
54 can be fit into 64 1 times, resulting in a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 6511.0
If we subtract 54 from 64, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 7:
54 goes into 100 1 times with a remainder of 46.
Put 1 as the next digit of the answer. 
Result so far: 6511.1
Deduct 54 from 100 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 8:
When dividing 460 by 54, we get 8 with a remainder of 28.
Use 8 as the next digit of our solution. 
Result so far: 6511.18
Subtract 432 from 460 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 9:
280 divided by 54 is 5 with a remainder of 10.
The next digit of our result is 5. 
Result so far: 6511.185
Subtracting 270 from 280 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 10:
54 can be fit into 100 1 times, resulting in a remainder of 46.
Record the quotient 1 as the next digit in the result. 
Result so far: 6511.1851
If we take 54 away from 100, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 11:
If we divide 460 by 54, we get 8 and a remainder of 28.
Put 8 as the next digit of the answer. 
Result so far: 6511.18518
If we subtract 432 from 460, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 12:
When dividing 280 by 54, we get 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 6511.185185
If we subtract 270 from 280, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 13:
The number 54 fits into 100 1 times, leaving a remainder of 46.
Record the quotient 1 as the next digit in the result. 
Result so far: 6511.1851851
Deduct 54 from 100 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 14:
When dividing 460 by 54, we get 8 with a remainder of 28.
Use 8 as the next digit of our solution. 
Result so far: 6511.18518518
Deduct 432 from 460 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final result is 6511.18518518 with a remainder of 2.8e-08.