We look at the division of 23919933 by 54 
The aim is to understand the frequency of 54 in 23919933.

Moving on to step 1:
When dividing 2 by 54, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 54

On to step 2:
54 goes into 23 0 times with a remainder of 23.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 23, we end up with 23.
Bring next digit (9) of the dividend behind the 23 and repeat the process: 239 / 54

Going ahead to step 3:
The number 54 fits into 239 4 times, leaving a remainder of 23.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 23 after subtracting 216 from 239.
Take the next digit (1) from the dividend and append it to 23, then repeat: 231 / 54

Moving on to step 4:
The number 54 fits into 231 4 times, leaving a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 44.0
Subtract 216 from 231 to get 15.
Fetch the next digit (9) from the dividend, attach it to 15 and continue: 159 / 54

Advancing to step 5:
54 goes into 159 2 times with a remainder of 51.
Put 2 as the next digit of the answer. 
Result so far: 442.0
Subtract 108 from 159 to get 51.
Bring next digit (9) of the dividend behind the 51 and repeat the process: 519 / 54

Going ahead to step 6:
519 divided by 54 is 9 with a remainder of 33.
Write down 9 as next digit of the result. 
Result so far: 4429.0
If we subtract 486 from 519, we get 33.
Include the next digit (3) from the dividend after 33, then repeat: 333 / 54

Going ahead to step 7:
The number 54 fits into 333 6 times, leaving a remainder of 9.
Record the quotient 6 as the next digit in the result. 
Result so far: 44296.0
If we subtract 324 from 333, we get 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 54

Let's proceed to step 8:
93 divided by 54 is 1 with a remainder of 39.
The next digit of our result is 1. 
Result so far: 442961.0
If we take 54 away from 93, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 9:
The number 54 fits into 390 7 times, leaving a remainder of 12.
Write down 7 as next digit of the result. 
Result so far: 442961.7
If we take 378 away from 390, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 10:
If we divide 120 by 54, we get 2 and a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 442961.72
The remainder is 12 after subtracting 108 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 11:
When dividing 120 by 54, we get 2 with a remainder of 12.
The next digit of our result is 2. 
Result so far: 442961.722
If we subtract 108 from 120, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 442961.722 and a remainder of 0.0012.