649620 divided by 4 
The aim is to understand the frequency of 4 in 649620.

Step 1:
The number 4 fits into 6 1 times, leaving a remainder of 2.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 4 from 6 leaves us with 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 4

On to step 2:
4 can be fit into 24 6 times, resulting in a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 16.0
Subtracting 24 from 24 leaves us with 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 4

On to step 3:
9 divided by 4 is 2 with a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 162.0
If we take 8 away from 9, we end up with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 4

Advancing to step 4:
4 goes into 16 4 times with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 1624.0
Subtracting 16 from 16 leaves us with 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 4

Moving on to step 5:
When dividing 2 by 4, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 16240.0
Subtract 0 from 2 to get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 4

Moving on to step 6:
The number 4 fits into 20 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 162405.0
Subtracting 20 from 20 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.

Step 7:
4 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 162405.0
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.

Going ahead to step 8:
4 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 162405.0
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.

In conclusion, the division gives 162405.0 with a balance of 0.0.