We look at the division of 425557 by 25 
The aim is to understand the frequency of 25 in 425557.

Going ahead to step 1:
When dividing 4 by 25, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 25

On to step 2:
25 goes into 42 1 times with a remainder of 17.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 17 after subtracting 25 from 42.
Grab the next digit (5) from the dividend, add it to 17, then carry on: 175 / 25

Let's proceed to step 3:
The number 25 fits into 175 7 times, leaving a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 17.0
Subtracting 175 from 175 leaves us with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 25

Going ahead to step 4:
If we divide 5 by 25, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 170.0
Subtract 0 from 5 to get 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 25

Going ahead to step 5:
25 goes into 55 2 times with a remainder of 5.
The next digit of our result is 2. 
Result so far: 1702.0
Subtracting 50 from 55 leaves us with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 25

Going ahead to step 6:
If we divide 57 by 25, we get 2 and a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 17022.0
Subtracting 50 from 57 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
If we divide 70 by 25, we get 2 and a remainder of 20.
The number 2 becomes the next digit in our result. 
Result so far: 17022.2
Subtracting 50 from 70 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 8:
If we divide 200 by 25, we get 8 and a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 17022.28
Subtracting 200 from 200 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.

Step 9:
The number 25 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 17022.28
If we take 0 away from 0, we end up 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.

Step 10:
0 divided by 25 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 17022.28
If we subtract 0 from 0, we get 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 outcome is 17022.28, with a leftover of 0.0.