We look at the division of 445807 by 25 
The aim is to understand the frequency of 25 in 445807.

Step 1:
When dividing 4 by 25, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 25

Step 2:
25 can be fit into 44 1 times, resulting in a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 25 from 44 to get 19.
Bring next digit (5) of the dividend behind the 19 and repeat the process: 195 / 25

Advancing to step 3:
195 divided by 25 is 7 with a remainder of 20.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Subtracting 175 from 195 leaves us with 20.
Include the next digit (8) from the dividend after 20, then repeat: 208 / 25

Step 4:
If we divide 208 by 25, we get 8 and a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 178.0
The remainder is 8 after subtracting 200 from 208.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 25

Advancing to step 5:
25 goes into 80 3 times with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 1783.0
The remainder is 5 after subtracting 75 from 80.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 25

Step 6:
57 divided by 25 is 2 with a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 17832.0
Subtract 50 from 57 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
When dividing 70 by 25, we get 2 with a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 17832.2
The remainder is 20 after subtracting 50 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
200 divided by 25 is 8 with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 17832.28
Subtract 200 from 200 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.

Let's proceed to step 9:
0 divided by 25 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 17832.28
The remainder is 0 after subtracting 0 from 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 10:
If we divide 0 by 25, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 17832.28
Subtracting 0 from 0 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.

The final outcome is 17832.28, with a leftover of 0.0.