We look at the division of 2631209 by 54 
The aim is to understand the frequency of 54 in 2631209.

On to step 1:
The number 54 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 54

Let's proceed to step 2:
When dividing 26 by 54, we get 0 with a remainder of 26.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 26 leaves us with 26.
Fetch the next digit (3) from the dividend, attach it to 26 and continue: 263 / 54

Let's proceed to step 3:
54 goes into 263 4 times with a remainder of 47.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 216 from 263 and we're left with 47.
Take the next digit (1) from the dividend and append it to 47, then repeat: 471 / 54

On to step 4:
If we divide 471 by 54, we get 8 and a remainder of 39.
Record the quotient 8 as the next digit in the result. 
Result so far: 48.0
If we take 432 away from 471, we end up with 39.
Include the next digit (2) from the dividend after 39, then repeat: 392 / 54

Moving on to step 5:
54 goes into 392 7 times with a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 487.0
If we take 378 away from 392, we end up with 14.
Include the next digit (0) from the dividend after 14, then repeat: 140 / 54

Let's proceed to step 6:
When dividing 140 by 54, we get 2 with a remainder of 32.
Use 2 as the next digit of our solution. 
Result so far: 4872.0
Subtract 108 from 140 to get 32.
Fetch the next digit (9) from the dividend, attach it to 32 and continue: 329 / 54

On to step 7:
If we divide 329 by 54, we get 6 and a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 48726.0
Subtracting 324 from 329 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 8:
If we divide 50 by 54, we get 0 and a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 48726.0
If we subtract 0 from 50, we 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 9:
54 can be fit into 500 9 times, resulting in a remainder of 14.
Use 9 as the next digit of our solution. 
Result so far: 48726.09
Subtract 486 from 500 to 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.

Going ahead to step 10:
The number 54 fits into 140 2 times, leaving a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 48726.092
Subtract 108 from 140 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.

Step 11:
The number 54 fits into 320 5 times, leaving a remainder of 50.
The next digit of our result is 5. 
Result so far: 48726.0925
Subtracting 270 from 320 leaves us 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.

Advancing to step 12:
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: 48726.09259
Deduct 486 from 500 and we're left 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.

Advancing to step 13:
140 divided by 54 is 2 with a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 48726.092592
If we take 108 away from 140, we end up with 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 14:
When dividing 320 by 54, we get 5 with a remainder of 50.
The next digit of our result is 5. 
Result so far: 48726.0925925
If we subtract 270 from 320, we 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.

Going ahead to step 15:
500 divided by 54 is 9 with a remainder of 14.
The next digit of our result is 9. 
Result so far: 48726.09259259
If we take 486 away from 500, we end up 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.

Our division results in 48726.09259259 with a remaining 1.4e-08.