Let's divide 631215 by 25
The aim is to understand the frequency of 25 in 631215.

Step 1:
When dividing 6 by 25, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 25

Moving on to step 2:
The number 25 fits into 63 2 times, leaving a remainder of 13.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 13 after subtracting 50 from 63.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 25

Going ahead to step 3:
If we divide 131 by 25, we get 5 and a remainder of 6.
Put 5 as the next digit of the answer. 
Result so far: 25.0
Deduct 125 from 131 and we're left with 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 25

On to step 4:
When dividing 62 by 25, we get 2 with a remainder of 12.
The next digit of our result is 2. 
Result so far: 252.0
The remainder is 12 after subtracting 50 from 62.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 25

Going ahead to step 5:
25 can be fit into 121 4 times, resulting in a remainder of 21.
Write down 4 as next digit of the result. 
Result so far: 2524.0
Deduct 100 from 121 and we're left with 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 25

Going ahead to step 6:
The number 25 fits into 215 8 times, leaving a remainder of 15.
Put 8 as the next digit of the answer. 
Result so far: 25248.0
If we subtract 200 from 215, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 7:
25 goes into 150 6 times with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 25248.6
If we subtract 150 from 150, 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.

Advancing to step 8:
25 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 25248.6
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.

Advancing to step 9:
0 divided by 25 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 25248.6
Deduct 0 from 0 and we're left 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.

In conclusion, the division gives 25248.6 with a balance of 0.0.