408525 divided by 4 
The aim is to understand the frequency of 4 in 408525.

Going ahead to step 1:
If we divide 4 by 4, we get 1 and a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 4 from 4 to get 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 4

Step 2:
4 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtracting 0 from 0 leaves us with 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 4

Let's proceed to step 3:
The number 4 fits into 8 2 times, leaving a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 102.0
The remainder is 0 after subtracting 8 from 8.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 4

Going ahead to step 4:
4 can be fit into 5 1 times, resulting in a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1021.0
Deduct 4 from 5 and we're left with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 4

Moving on to step 5:
4 can be fit into 12 3 times, resulting in a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 10213.0
Subtract 12 from 12 to get 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 4

Going ahead to step 6:
The number 4 fits into 5 1 times, leaving a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 102131.0
Subtract 4 from 5 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
When dividing 10 by 4, we get 2 with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 102131.2
Subtract 8 from 10 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.

Advancing to step 8:
4 goes into 20 5 times with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 102131.25
If we take 20 away from 20, 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.

Let's proceed to step 9:
When dividing 0 by 4, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 102131.25
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.

Going ahead to step 10:
If we divide 0 by 4, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 102131.25
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.

After the division, we end up with 102131.25 and a remainder of 0.0.