We look at the division of 25989455 by 904 
The aim is to understand the frequency of 904 in 25989455.

On to step 1:
2 divided by 904 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 904

Let's proceed to step 2:
904 can be fit into 25 0 times, resulting in a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Bring next digit (9) of the dividend behind the 25 and repeat the process: 259 / 904

Moving on to step 3:
259 divided by 904 is 0 with a remainder of 259.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 259 after subtracting 0 from 259.
Grab the next digit (8) from the dividend, add it to 259, then carry on: 2598 / 904

Moving on to step 4:
2598 divided by 904 is 2 with a remainder of 790.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 1808 from 2598 leaves us with 790.
Fetch the next digit (9) from the dividend, attach it to 790 and continue: 7909 / 904

Going ahead to step 5:
904 goes into 7909 8 times with a remainder of 677.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
Subtract 7232 from 7909 to get 677.
Bring next digit (4) of the dividend behind the 677 and repeat the process: 6774 / 904

Let's proceed to step 6:
When dividing 6774 by 904, we get 7 with a remainder of 446.
Use 7 as the next digit of our solution. 
Result so far: 287.0
If we subtract 6328 from 6774, we get 446.
Grab the next digit (5) from the dividend, add it to 446, then carry on: 4465 / 904

Moving on to step 7:
4465 divided by 904 is 4 with a remainder of 849.
Record the quotient 4 as the next digit in the result. 
Result so far: 2874.0
Subtracting 3616 from 4465 leaves us with 849.
Append the next digit (5) from the dividend to 849 and continue with: 8495 / 904

Going ahead to step 8:
904 goes into 8495 9 times with a remainder of 359.
Record the quotient 9 as the next digit in the result. 
Result so far: 28749.0
Subtracting 8136 from 8495 leaves us with 359.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3590, and continue the process.

Going ahead to step 9:
3590 divided by 904 is 3 with a remainder of 878.
The next digit of our result is 3. 
Result so far: 28749.3
Subtracting 2712 from 3590 leaves us with 878.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8780, and continue the process.

Going ahead to step 10:
If we divide 8780 by 904, we get 9 and a remainder of 644.
Record the quotient 9 as the next digit in the result. 
Result so far: 28749.39
Subtract 8136 from 8780 to get 644.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6440, and continue the process.

On to step 11:
When dividing 6440 by 904, we get 7 with a remainder of 112.
Record the quotient 7 as the next digit in the result. 
Result so far: 28749.397
Subtracting 6328 from 6440 leaves us with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Let's proceed to step 12:
904 goes into 1120 1 times with a remainder of 216.
Use 1 as the next digit of our solution. 
Result so far: 28749.3971
If we take 904 away from 1120, we end up with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Moving on to step 13:
904 can be fit into 2160 2 times, resulting in a remainder of 352.
Write down 2 as next digit of the result. 
Result so far: 28749.39712
If we take 1808 away from 2160, we end up with 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

On to step 14:
904 goes into 3520 3 times with a remainder of 808.
Record the quotient 3 as the next digit in the result. 
Result so far: 28749.397123
Deduct 2712 from 3520 and we're left with 808.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8080, and continue the process.

Let's proceed to step 15:
8080 divided by 904 is 8 with a remainder of 848.
The next digit of our result is 8. 
Result so far: 28749.3971238
Deduct 7232 from 8080 and we're left with 848.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8480, and continue the process.

Moving on to step 16:
904 can be fit into 8480 9 times, resulting in a remainder of 344.
The number 9 becomes the next digit in our result. 
Result so far: 28749.39712389
Deduct 8136 from 8480 and we're left with 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

The quotient of the division is 28749.39712389, and the remainder is 3.44e-07.