We're dividing 604661 by 25 
The aim is to understand the frequency of 25 in 604661.

Advancing to step 1:
25 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 25

Moving on to step 2:
When dividing 60 by 25, we get 2 with a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 50 from 60, we get 10.
Append the next digit (4) from the dividend to 10 and continue with: 104 / 25

Moving on to step 3:
When dividing 104 by 25, we get 4 with a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 24.0
If we take 100 away from 104, we end up with 4.
Append the next digit (6) from the dividend to 4 and continue with: 46 / 25

Let's proceed to step 4:
25 can be fit into 46 1 times, resulting in a remainder of 21.
Record the quotient 1 as the next digit in the result. 
Result so far: 241.0
If we take 25 away from 46, we end up with 21.
Fetch the next digit (6) from the dividend, attach it to 21 and continue: 216 / 25

Let's proceed to step 5:
If we divide 216 by 25, we get 8 and a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 2418.0
Subtract 200 from 216 to get 16.
Grab the next digit (1) from the dividend, add it to 16, then carry on: 161 / 25

On to step 6:
When dividing 161 by 25, we get 6 with a remainder of 11.
The number 6 becomes the next digit in our result. 
Result so far: 24186.0
Subtracting 150 from 161 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 7:
110 divided by 25 is 4 with a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 24186.4
Deduct 100 from 110 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
100 divided by 25 is 4 with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 24186.44
Subtracting 100 from 100 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.

The final result is 24186.44 with a remainder of 0.0.