Let's divide 621959 by 4
The aim is to understand the frequency of 4 in 621959.

Let's proceed to step 1:
4 goes into 6 1 times with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 4 from 6 to get 2.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 4

Advancing to step 2:
When dividing 22 by 4, we get 5 with a remainder of 2.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Subtract 20 from 22 to get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 4

Let's proceed to step 3:
4 can be fit into 21 5 times, resulting in a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 155.0
Subtracting 20 from 21 leaves us with 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 4

Moving on to step 4:
19 divided by 4 is 4 with a remainder of 3.
Put 4 as the next digit of the answer. 
Result so far: 1554.0
If we take 16 away from 19, we end up with 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 4

Let's proceed to step 5:
The number 4 fits into 35 8 times, leaving a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 15548.0
Deduct 32 from 35 and we're left with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 4

Going ahead to step 6:
When dividing 39 by 4, we get 9 with a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 155489.0
If we subtract 36 from 39, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
4 can be fit into 30 7 times, resulting in a remainder of 2.
Use 7 as the next digit of our solution. 
Result so far: 155489.7
If we take 28 away from 30, we end up with 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 8:
When dividing 20 by 4, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 155489.75
The remainder is 0 after subtracting 20 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
4 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 155489.75
If we take 0 away from 0, 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.

Advancing to step 10:
The number 4 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 155489.75
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.

In conclusion, the division gives 155489.75 with a balance of 0.0.