287166 ÷ 25 
The aim is to understand the frequency of 25 in 287166.

Let's proceed to step 1:
When dividing 2 by 25, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 25

Let's proceed to step 2:
25 goes into 28 1 times with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 3 after subtracting 25 from 28.
Append the next digit (7) from the dividend to 3 and continue with: 37 / 25

Advancing to step 3:
25 can be fit into 37 1 times, resulting in a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we subtract 25 from 37, we get 12.
Fetch the next digit (1) from the dividend, attach it to 12 and continue: 121 / 25

On to step 4:
The number 25 fits into 121 4 times, leaving a remainder of 21.
The number 4 becomes the next digit in our result. 
Result so far: 114.0
Deduct 100 from 121 and we're left with 21.
Take the next digit (6) from the dividend and append it to 21, then repeat: 216 / 25

On to step 5:
The number 25 fits into 216 8 times, leaving a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 1148.0
The remainder is 16 after subtracting 200 from 216.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 25

Moving on to step 6:
25 can be fit into 166 6 times, resulting in a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 11486.0
If we take 150 away from 166, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 7:
25 goes into 160 6 times with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 11486.6
If we take 150 away from 160, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
25 can be fit into 100 4 times, resulting in a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 11486.64
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.

Advancing to step 9:
0 divided by 25 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 11486.64
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.

Moving on to step 10:
The number 25 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 11486.64
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.

The final outcome is 11486.64, with a leftover of 0.0.