We look at the division of 771951 by 25 
The aim is to understand the frequency of 25 in 771951.

Going ahead to step 1:
7 divided by 25 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 25

Going ahead to step 2:
If we divide 77 by 25, we get 3 and a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 75 away from 77, we end up with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 25

Step 3:
When dividing 21 by 25, we get 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 30.0
The remainder is 21 after subtracting 0 from 21.
Fetch the next digit (9) from the dividend, attach it to 21 and continue: 219 / 25

Moving on to step 4:
25 can be fit into 219 8 times, resulting in a remainder of 19.
The next digit of our result is 8. 
Result so far: 308.0
If we take 200 away from 219, we end up with 19.
Fetch the next digit (5) from the dividend, attach it to 19 and continue: 195 / 25

On to step 5:
195 divided by 25 is 7 with a remainder of 20.
Write down 7 as next digit of the result. 
Result so far: 3087.0
Subtracting 175 from 195 leaves us with 20.
Append the next digit (1) from the dividend to 20 and continue with: 201 / 25

Moving on to step 6:
If we divide 201 by 25, we get 8 and a remainder of 1.
Record the quotient 8 as the next digit in the result. 
Result so far: 30878.0
The remainder is 1 after subtracting 200 from 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
The number 25 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 30878.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
When dividing 100 by 25, we get 4 with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 30878.04
Deduct 100 from 100 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.

Let's proceed to step 9:
25 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 30878.04
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.

Step 10:
25 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 30878.04
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.

The quotient of the division is 30878.04, and the remainder is 0.0.