We look at the division of 221594 by 54 
The aim is to understand the frequency of 54 in 221594.

Step 1:
54 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 54

On to step 2:
The number 54 fits into 22 0 times, leaving a remainder of 22.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 22 to get 22.
Take the next digit (1) from the dividend and append it to 22, then repeat: 221 / 54

Step 3:
If we divide 221 by 54, we get 4 and a remainder of 5.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 216 from 221 and we're left with 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 54

Step 4:
If we divide 55 by 54, we get 1 and a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 41.0
If we take 54 away from 55, we end up with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 54

Let's proceed to step 5:
When dividing 19 by 54, we get 0 with a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 410.0
If we subtract 0 from 19, we get 19.
Take the next digit (4) from the dividend and append it to 19, then repeat: 194 / 54

Going ahead to step 6:
If we divide 194 by 54, we get 3 and a remainder of 32.
The next digit of our result is 3. 
Result so far: 4103.0
Subtract 162 from 194 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 7:
When dividing 320 by 54, we get 5 with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 4103.5
Deduct 270 from 320 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 8:
500 divided by 54 is 9 with a remainder of 14.
Record the quotient 9 as the next digit in the result. 
Result so far: 4103.59
Subtracting 486 from 500 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 9:
54 goes into 140 2 times with a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 4103.592
The remainder is 32 after subtracting 108 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 10:
54 goes into 320 5 times with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 4103.5925
Subtract 270 from 320 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 11:
500 divided by 54 is 9 with a remainder of 14.
Write down 9 as next digit of the result. 
Result so far: 4103.59259
If we subtract 486 from 500, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 12:
54 can be fit into 140 2 times, resulting in a remainder of 32.
The next digit of our result is 2. 
Result so far: 4103.592592
The remainder is 32 after subtracting 108 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 13:
54 goes into 320 5 times with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 4103.5925925
The remainder is 50 after subtracting 270 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 14:
If we divide 500 by 54, we get 9 and a remainder of 14.
Use 9 as the next digit of our solution. 
Result so far: 4103.59259259
Subtracting 486 from 500 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final result is 4103.59259259 with a remainder of 1.4e-08.