99931 divided by 25 
The aim is to understand the frequency of 25 in 99931.

Moving on to step 1:
If we divide 9 by 25, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 25

Advancing to step 2:
99 divided by 25 is 3 with a remainder of 24.
The next digit of our result is 3. 
Result so far: 3.0
If we take 75 away from 99, we end up with 24.
Bring next digit (9) of the dividend behind the 24 and repeat the process: 249 / 25

Advancing to step 3:
25 goes into 249 9 times with a remainder of 24.
Write down 9 as next digit of the result. 
Result so far: 39.0
If we subtract 225 from 249, we get 24.
Fetch the next digit (3) from the dividend, attach it to 24 and continue: 243 / 25

Let's proceed to step 4:
The number 25 fits into 243 9 times, leaving a remainder of 18.
Write down 9 as next digit of the result. 
Result so far: 399.0
Deduct 225 from 243 and we're left with 18.
Grab the next digit (1) from the dividend, add it to 18, then carry on: 181 / 25

Let's proceed to step 5:
The number 25 fits into 181 7 times, leaving a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 3997.0
Subtract 175 from 181 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 6:
The number 25 fits into 60 2 times, leaving a remainder of 10.
The next digit of our result is 2. 
Result so far: 3997.2
Subtract 50 from 60 to get 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 7:
If we divide 100 by 25, we get 4 and a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 3997.24
Subtract 100 from 100 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.

Step 8:
25 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 3997.24
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.

Advancing to step 9:
When dividing 0 by 25, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 3997.24
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.

After the division, we end up with 3997.24 and a remainder of 0.0.