389215 divided by 54 
The aim is to understand the frequency of 54 in 389215.

Going ahead to step 1:
The number 54 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 54

Moving on to step 2:
If we divide 38 by 54, we get 0 and a remainder of 38.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 38, we end up with 38.
Take the next digit (9) from the dividend and append it to 38, then repeat: 389 / 54

On to step 3:
389 divided by 54 is 7 with a remainder of 11.
The next digit of our result is 7. 
Result so far: 7.0
If we take 378 away from 389, we end up with 11.
Bring next digit (2) of the dividend behind the 11 and repeat the process: 112 / 54

Moving on to step 4:
If we divide 112 by 54, we get 2 and a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 72.0
If we take 108 away from 112, we end up with 4.
Grab the next digit (1) from the dividend, add it to 4, then carry on: 41 / 54

Let's proceed to step 5:
When dividing 41 by 54, we get 0 with a remainder of 41.
Record the quotient 0 as the next digit in the result. 
Result so far: 720.0
Deduct 0 from 41 and we're left with 41.
Take the next digit (5) from the dividend and append it to 41, then repeat: 415 / 54

Moving on to step 6:
54 goes into 415 7 times with a remainder of 37.
Put 7 as the next digit of the answer. 
Result so far: 7207.0
Subtracting 378 from 415 leaves us with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 7:
The number 54 fits into 370 6 times, leaving a remainder of 46.
Record the quotient 6 as the next digit in the result. 
Result so far: 7207.6
If we subtract 324 from 370, we get 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 8:
54 goes into 460 8 times with a remainder of 28.
Write down 8 as next digit of the result. 
Result so far: 7207.68
If we take 432 away from 460, we end up 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.

Step 9:
The number 54 fits into 280 5 times, leaving a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 7207.685
Deduct 270 from 280 and we're left 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.

On to step 10:
When dividing 100 by 54, we get 1 with a remainder of 46.
The next digit of our result is 1. 
Result so far: 7207.6851
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.

Going ahead to step 11:
When dividing 460 by 54, we get 8 with a remainder of 28.
The next digit of our result is 8. 
Result so far: 7207.68518
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.

Let's proceed to step 12:
54 goes into 280 5 times with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 7207.685185
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.

On to step 13:
54 goes into 100 1 times with a remainder of 46.
Put 1 as the next digit of the answer. 
Result so far: 7207.6851851
Subtract 54 from 100 to get 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 14:
460 divided by 54 is 8 with a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 7207.68518518
Subtracting 432 from 460 leaves us 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.

Our division results in 7207.68518518 with a remaining 2.8e-08.