Let's divide 491602 by 4
The aim is to understand the frequency of 4 in 491602.

Moving on to step 1:
4 can be fit into 4 1 times, resulting in a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 0 after subtracting 4 from 4.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 4

Going ahead to step 2:
9 divided by 4 is 2 with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Deduct 8 from 9 and we're left with 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 4

Advancing to step 3:
11 divided by 4 is 2 with a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 122.0
Deduct 8 from 11 and we're left with 3.
Include the next digit (6) from the dividend after 3, then repeat: 36 / 4

Advancing to step 4:
4 can be fit into 36 9 times, resulting in a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 1229.0
Subtract 36 from 36 to get 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 4

Going ahead to step 5:
The number 4 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 12290.0
Deduct 0 from 0 and we're left with 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 4

On to step 6:
If we divide 2 by 4, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 122900.0
The remainder is 2 after subtracting 0 from 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
4 can be fit into 20 5 times, resulting in a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 122900.5
Deduct 20 from 20 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.

Going ahead to step 8:
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: 122900.5
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.

Moving on to step 9:
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: 122900.5
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.

The final outcome is 122900.5, with a leftover of 0.0.