831578 ÷ 25 
The aim is to understand the frequency of 25 in 831578.

Step 1:
25 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 25

Step 2:
25 can be fit into 83 3 times, resulting in a remainder of 8.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 75 from 83, we get 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 25

Moving on to step 3:
25 can be fit into 81 3 times, resulting in a remainder of 6.
The next digit of our result is 3. 
Result so far: 33.0
Deduct 75 from 81 and we're left with 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 25

Step 4:
25 goes into 65 2 times with a remainder of 15.
Put 2 as the next digit of the answer. 
Result so far: 332.0
If we subtract 50 from 65, we get 15.
Grab the next digit (7) from the dividend, add it to 15, then carry on: 157 / 25

On to step 5:
When dividing 157 by 25, we get 6 with a remainder of 7.
The next digit of our result is 6. 
Result so far: 3326.0
If we subtract 150 from 157, we get 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 25

Let's proceed to step 6:
25 can be fit into 78 3 times, resulting in a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 33263.0
Deduct 75 from 78 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
25 goes into 30 1 times with a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 33263.1
Subtract 25 from 30 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 8:
25 goes into 50 2 times with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 33263.12
Subtract 50 from 50 to 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 9:
0 divided by 25 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 33263.12
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.
Write down 0 as next digit of the result. 
Result so far: 33263.12
Subtracting 0 from 0 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.

Our division results in 33263.12 with a remaining 0.0.