We're dividing 648139 by 48 
The aim is to understand the frequency of 48 in 648139.

Advancing to step 1:
If we divide 6 by 48, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 48

Advancing to step 2:
The number 48 fits into 64 1 times, leaving a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 16 after subtracting 48 from 64.
Grab the next digit (8) from the dividend, add it to 16, then carry on: 168 / 48

Let's proceed to step 3:
When dividing 168 by 48, we get 3 with a remainder of 24.
The next digit of our result is 3. 
Result so far: 13.0
The remainder is 24 after subtracting 144 from 168.
Fetch the next digit (1) from the dividend, attach it to 24 and continue: 241 / 48

Moving on to step 4:
If we divide 241 by 48, we get 5 and a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 135.0
If we take 240 away from 241, we end up with 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 48

Let's proceed to step 5:
48 can be fit into 13 0 times, resulting in a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 1350.0
If we subtract 0 from 13, we get 13.
Include the next digit (9) from the dividend after 13, then repeat: 139 / 48

On to step 6:
48 can be fit into 139 2 times, resulting in a remainder of 43.
Record the quotient 2 as the next digit in the result. 
Result so far: 13502.0
Subtracting 96 from 139 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 7:
If we divide 430 by 48, we get 8 and a remainder of 46.
The number 8 becomes the next digit in our result. 
Result so far: 13502.8
Subtract 384 from 430 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.

On to step 8:
The number 48 fits into 460 9 times, leaving a remainder of 28.
Use 9 as the next digit of our solution. 
Result so far: 13502.89
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 9:
When dividing 280 by 48, we get 5 with a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 13502.895
The remainder is 40 after subtracting 240 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
The number 48 fits into 400 8 times, leaving a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 13502.8958
Subtracting 384 from 400 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 11:
48 goes into 160 3 times with a remainder of 16.
Record the quotient 3 as the next digit in the result. 
Result so far: 13502.89583
If we take 144 away from 160, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 12:
48 goes into 160 3 times with a remainder of 16.
The number 3 becomes the next digit in our result. 
Result so far: 13502.895833
Deduct 144 from 160 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 13502.895833, with a leftover of 1.6e-06.