We look at the division of 921625 by 54 
The aim is to understand the frequency of 54 in 921625.

Moving on to step 1:
When dividing 9 by 54, we get 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (2) from the dividend, attach it to 9 and continue: 92 / 54

Moving on to step 2:
92 divided by 54 is 1 with a remainder of 38.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 54 from 92 leaves us with 38.
Append the next digit (1) from the dividend to 38 and continue with: 381 / 54

Advancing to step 3:
381 divided by 54 is 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
Deduct 378 from 381 and we're left with 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 54

Let's proceed to step 4:
54 can be fit into 36 0 times, resulting in a remainder of 36.
The number 0 becomes the next digit in our result. 
Result so far: 170.0
Deduct 0 from 36 and we're left with 36.
Include the next digit (2) from the dividend after 36, then repeat: 362 / 54

Going ahead to step 5:
54 can be fit into 362 6 times, resulting in a remainder of 38.
The next digit of our result is 6. 
Result so far: 1706.0
If we subtract 324 from 362, we get 38.
Bring next digit (5) of the dividend behind the 38 and repeat the process: 385 / 54

Advancing to step 6:
The number 54 fits into 385 7 times, leaving a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 17067.0
The remainder is 7 after subtracting 378 from 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 7:
The number 54 fits into 70 1 times, leaving a remainder of 16.
The next digit of our result is 1. 
Result so far: 17067.1
Subtract 54 from 70 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 8:
When dividing 160 by 54, we get 2 with a remainder of 52.
Record the quotient 2 as the next digit in the result. 
Result so far: 17067.12
The remainder is 52 after subtracting 108 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 9:
54 can be fit into 520 9 times, resulting in a remainder of 34.
Write down 9 as next digit of the result. 
Result so far: 17067.129
If we subtract 486 from 520, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 10:
54 goes into 340 6 times with a remainder of 16.
Record the quotient 6 as the next digit in the result. 
Result so far: 17067.1296
If we subtract 324 from 340, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 11:
160 divided by 54 is 2 with a remainder of 52.
The next digit of our result is 2. 
Result so far: 17067.12962
Subtract 108 from 160 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 12:
54 goes into 520 9 times with a remainder of 34.
Write down 9 as next digit of the result. 
Result so far: 17067.129629
Deduct 486 from 520 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 13:
When dividing 340 by 54, we get 6 with a remainder of 16.
Record the quotient 6 as the next digit in the result. 
Result so far: 17067.1296296
The remainder is 16 after subtracting 324 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 14:
If we divide 160 by 54, we get 2 and a remainder of 52.
Use 2 as the next digit of our solution. 
Result so far: 17067.12962962
Subtract 108 from 160 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Our division results in 17067.12962962 with a remaining 5.2e-08.