545602 ÷ 25 
The aim is to understand the frequency of 25 in 545602.

On to step 1:
When dividing 5 by 25, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 25

Advancing to step 2:
If we divide 54 by 25, we get 2 and a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 50 away from 54, we end up with 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 25

Let's proceed to step 3:
If we divide 45 by 25, we get 1 and a remainder of 20.
The next digit of our result is 1. 
Result so far: 21.0
Deduct 25 from 45 and we're left with 20.
Fetch the next digit (6) from the dividend, attach it to 20 and continue: 206 / 25

Going ahead to step 4:
206 divided by 25 is 8 with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 218.0
If we subtract 200 from 206, we get 6.
Fetch the next digit (0) from the dividend, attach it to 6 and continue: 60 / 25

Let's proceed to step 5:
25 can be fit into 60 2 times, resulting in a remainder of 10.
The next digit of our result is 2. 
Result so far: 2182.0
Deduct 50 from 60 and we're left with 10.
Include the next digit (2) from the dividend after 10, then repeat: 102 / 25

Step 6:
When dividing 102 by 25, we get 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 21824.0
Subtract 100 from 102 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 7:
20 divided by 25 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 21824.0
Deduct 0 from 20 and we're left with 20.
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:
25 can be fit into 200 8 times, resulting in a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 21824.08
If we take 200 away from 200, 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.

Moving on to step 9:
The number 25 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 21824.08
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.

On to step 10:
25 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 21824.08
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.

The final result is 21824.08 with a remainder of 0.0.