48641397 divided by 909 
The aim is to understand the frequency of 909 in 48641397.

On to step 1:
The number 909 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 909

Step 2:
48 divided by 909 is 0 with a remainder of 48.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 48 leaves us with 48.
Bring next digit (6) of the dividend behind the 48 and repeat the process: 486 / 909

Moving on to step 3:
486 divided by 909 is 0 with a remainder of 486.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 486 to get 486.
Include the next digit (4) from the dividend after 486, then repeat: 4864 / 909

Moving on to step 4:
The number 909 fits into 4864 5 times, leaving a remainder of 319.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Deduct 4545 from 4864 and we're left with 319.
Append the next digit (1) from the dividend to 319 and continue with: 3191 / 909

On to step 5:
The number 909 fits into 3191 3 times, leaving a remainder of 464.
Record the quotient 3 as the next digit in the result. 
Result so far: 53.0
If we take 2727 away from 3191, we end up with 464.
Fetch the next digit (3) from the dividend, attach it to 464 and continue: 4643 / 909

Let's proceed to step 6:
When dividing 4643 by 909, we get 5 with a remainder of 98.
Write down 5 as next digit of the result. 
Result so far: 535.0
The remainder is 98 after subtracting 4545 from 4643.
Take the next digit (9) from the dividend and append it to 98, then repeat: 989 / 909

On to step 7:
909 can be fit into 989 1 times, resulting in a remainder of 80.
Put 1 as the next digit of the answer. 
Result so far: 5351.0
Subtract 909 from 989 to get 80.
Include the next digit (7) from the dividend after 80, then repeat: 807 / 909

Moving on to step 8:
The number 909 fits into 807 0 times, leaving a remainder of 807.
Record the quotient 0 as the next digit in the result. 
Result so far: 53510.0
Subtracting 0 from 807 leaves us with 807.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8070, and continue the process.

Going ahead to step 9:
If we divide 8070 by 909, we get 8 and a remainder of 798.
The next digit of our result is 8. 
Result so far: 53510.8
Subtract 7272 from 8070 to get 798.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7980, and continue the process.

On to step 10:
If we divide 7980 by 909, we get 8 and a remainder of 708.
Put 8 as the next digit of the answer. 
Result so far: 53510.88
Deduct 7272 from 7980 and we're left with 708.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7080, and continue the process.

The final result is 53510.88 with a remainder of 0.708.