We look at the division of 305121 by 48 
The aim is to understand the frequency of 48 in 305121.

Going ahead to step 1:
3 divided by 48 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 48

Step 2:
The number 48 fits into 30 0 times, leaving a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 30 after subtracting 0 from 30.
Fetch the next digit (5) from the dividend, attach it to 30 and continue: 305 / 48

Let's proceed to step 3:
When dividing 305 by 48, we get 6 with a remainder of 17.
Write down 6 as next digit of the result. 
Result so far: 6.0
The remainder is 17 after subtracting 288 from 305.
Include the next digit (1) from the dividend after 17, then repeat: 171 / 48

Step 4:
When dividing 171 by 48, we get 3 with a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 63.0
Subtracting 144 from 171 leaves us with 27.
Grab the next digit (2) from the dividend, add it to 27, then carry on: 272 / 48

On to step 5:
272 divided by 48 is 5 with a remainder of 32.
The number 5 becomes the next digit in our result. 
Result so far: 635.0
Subtract 240 from 272 to get 32.
Grab the next digit (1) from the dividend, add it to 32, then carry on: 321 / 48

Step 6:
The number 48 fits into 321 6 times, leaving a remainder of 33.
Write down 6 as next digit of the result. 
Result so far: 6356.0
The remainder is 33 after subtracting 288 from 321.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 7:
The number 48 fits into 330 6 times, leaving a remainder of 42.
Record the quotient 6 as the next digit in the result. 
Result so far: 6356.6
If we subtract 288 from 330, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 8:
420 divided by 48 is 8 with a remainder of 36.
The next digit of our result is 8. 
Result so far: 6356.68
Subtract 384 from 420 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 9:
If we divide 360 by 48, we get 7 and a remainder of 24.
Record the quotient 7 as the next digit in the result. 
Result so far: 6356.687
If we take 336 away from 360, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 10:
48 can be fit into 240 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 6356.6875
Deduct 240 from 240 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 11:
48 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 6356.6875
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 12:
When dividing 0 by 48, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 6356.6875
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 6356.6875 and a remainder of 0.0.