We're dividing 857284 by 25 
The aim is to understand the frequency of 25 in 857284.

Moving on to step 1:
When dividing 8 by 25, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 25

Advancing to step 2:
25 goes into 85 3 times with a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 75 from 85 and we're left with 10.
Bring next digit (7) of the dividend behind the 10 and repeat the process: 107 / 25

Moving on to step 3:
25 can be fit into 107 4 times, resulting in a remainder of 7.
Put 4 as the next digit of the answer. 
Result so far: 34.0
Subtracting 100 from 107 leaves us with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 25

Moving on to step 4:
If we divide 72 by 25, we get 2 and a remainder of 22.
Put 2 as the next digit of the answer. 
Result so far: 342.0
If we subtract 50 from 72, we get 22.
Bring next digit (8) of the dividend behind the 22 and repeat the process: 228 / 25

Moving on to step 5:
25 goes into 228 9 times with a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 3429.0
The remainder is 3 after subtracting 225 from 228.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 25

Advancing to step 6:
The number 25 fits into 34 1 times, leaving a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 34291.0
Subtracting 25 from 34 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 7:
25 goes into 90 3 times with a remainder of 15.
The next digit of our result is 3. 
Result so far: 34291.3
Subtracting 75 from 90 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 8:
25 goes into 150 6 times with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 34291.36
Subtracting 150 from 150 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.

Advancing to step 9:
0 divided by 25 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 34291.36
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.

Going ahead to step 10:
If we divide 0 by 25, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 34291.36
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.

Our division results in 34291.36 with a remaining 0.0.