We look at the division of 390900 by 48 
The aim is to understand the frequency of 48 in 390900.

Moving on to step 1:
The number 48 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 48

On to step 2:
When dividing 39 by 48, we get 0 with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Bring next digit (0) of the dividend behind the 39 and repeat the process: 390 / 48

Moving on to step 3:
390 divided by 48 is 8 with a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtract 384 from 390 to get 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 48

On to step 4:
If we divide 69 by 48, we get 1 and a remainder of 21.
Record the quotient 1 as the next digit in the result. 
Result so far: 81.0
If we take 48 away from 69, we end up with 21.
Include the next digit (0) from the dividend after 21, then repeat: 210 / 48

Let's proceed to step 5:
48 goes into 210 4 times with a remainder of 18.
Write down 4 as next digit of the result. 
Result so far: 814.0
If we take 192 away from 210, we end up with 18.
Bring next digit (0) of the dividend behind the 18 and repeat the process: 180 / 48

Let's proceed to step 6:
48 can be fit into 180 3 times, resulting in a remainder of 36.
Use 3 as the next digit of our solution. 
Result so far: 8143.0
The remainder is 36 after subtracting 144 from 180.
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 7:
If we divide 360 by 48, we get 7 and a remainder of 24.
Use 7 as the next digit of our solution. 
Result so far: 8143.7
If we subtract 336 from 360, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 8:
48 goes into 240 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 8143.75
Subtracting 240 from 240 leaves us 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 9:
48 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 8143.75
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.

Let's proceed to step 10:
When dividing 0 by 48, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 8143.75
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.

The quotient of the division is 8143.75, and the remainder is 0.0.