We look at the division of 399176 by 25 
The aim is to understand the frequency of 25 in 399176.

Step 1:
When dividing 3 by 25, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 25

Going ahead to step 2:
39 divided by 25 is 1 with a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 25 from 39 to get 14.
Append the next digit (9) from the dividend to 14 and continue with: 149 / 25

Let's proceed to step 3:
149 divided by 25 is 5 with a remainder of 24.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Deduct 125 from 149 and we're left with 24.
Include the next digit (1) from the dividend after 24, then repeat: 241 / 25

Going ahead to step 4:
When dividing 241 by 25, we get 9 with a remainder of 16.
Record the quotient 9 as the next digit in the result. 
Result so far: 159.0
If we take 225 away from 241, we end up with 16.
Include the next digit (7) from the dividend after 16, then repeat: 167 / 25

Let's proceed to step 5:
25 goes into 167 6 times with a remainder of 17.
Record the quotient 6 as the next digit in the result. 
Result so far: 1596.0
The remainder is 17 after subtracting 150 from 167.
Bring next digit (6) of the dividend behind the 17 and repeat the process: 176 / 25

Let's proceed to step 6:
25 can be fit into 176 7 times, resulting in a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 15967.0
The remainder is 1 after subtracting 175 from 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
25 goes into 10 0 times with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 15967.0
If we take 0 away from 10, we end up 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:
If we divide 100 by 25, we get 4 and a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 15967.04
If we take 100 away from 100, 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.

Let's proceed to step 9:
25 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 15967.04
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.

Moving on to step 10:
25 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 15967.04
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.

Our division results in 15967.04 with a remaining 0.0.