We look at the division of 87051255 by 25 
The aim is to understand the frequency of 25 in 87051255.

Moving on to step 1:
The number 25 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 25

Advancing to step 2:
The number 25 fits into 87 3 times, leaving a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 75 from 87, we get 12.
Include the next digit (0) from the dividend after 12, then repeat: 120 / 25

Advancing to step 3:
25 can be fit into 120 4 times, resulting in a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 34.0
Deduct 100 from 120 and we're left with 20.
Fetch the next digit (5) from the dividend, attach it to 20 and continue: 205 / 25

On to step 4:
25 can be fit into 205 8 times, resulting in a remainder of 5.
The next digit of our result is 8. 
Result so far: 348.0
If we subtract 200 from 205, we get 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 25

On to step 5:
When dividing 51 by 25, we get 2 with a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 3482.0
The remainder is 1 after subtracting 50 from 51.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 25

Step 6:
The number 25 fits into 12 0 times, leaving a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 34820.0
The remainder is 12 after subtracting 0 from 12.
Append the next digit (5) from the dividend to 12 and continue with: 125 / 25

Going ahead to step 7:
25 goes into 125 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 348205.0
Subtract 125 from 125 to get 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 25

Let's proceed to step 8:
If we divide 5 by 25, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 3482050.0
Deduct 0 from 5 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 9:
The number 25 fits into 50 2 times, leaving a remainder of 0.
The next digit of our result is 2. 
Result so far: 3482050.2
The remainder is 0 after subtracting 50 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
The number 25 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 3482050.2
Subtract 0 from 0 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 11:
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: 3482050.2
Subtract 0 from 0 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.

Our division results in 3482050.2 with a remaining 0.0.