We're dividing 502403 by 64 
The aim is to understand the frequency of 64 in 502403.

Moving on to step 1:
The number 64 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 64

On to step 2:
The number 64 fits into 50 0 times, leaving a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 50, we end up with 50.
Take the next digit (2) from the dividend and append it to 50, then repeat: 502 / 64

Advancing to step 3:
The number 64 fits into 502 7 times, leaving a remainder of 54.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we subtract 448 from 502, we get 54.
Take the next digit (4) from the dividend and append it to 54, then repeat: 544 / 64

Step 4:
If we divide 544 by 64, we get 8 and a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 78.0
The remainder is 32 after subtracting 512 from 544.
Take the next digit (0) from the dividend and append it to 32, then repeat: 320 / 64

Advancing to step 5:
The number 64 fits into 320 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 785.0
Deduct 320 from 320 and we're left with 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 64

Going ahead to step 6:
The number 64 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 7850.0
Deduct 0 from 3 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
If we divide 30 by 64, we get 0 and a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 7850.0
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 8:
64 goes into 300 4 times with a remainder of 44.
The next digit of our result is 4. 
Result so far: 7850.04
Subtract 256 from 300 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 9:
64 goes into 440 6 times with a remainder of 56.
The next digit of our result is 6. 
Result so far: 7850.046
Subtract 384 from 440 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 10:
If we divide 560 by 64, we get 8 and a remainder of 48.
Write down 8 as next digit of the result. 
Result so far: 7850.0468
If we subtract 512 from 560, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 11:
64 goes into 480 7 times with a remainder of 32.
Record the quotient 7 as the next digit in the result. 
Result so far: 7850.04687
Deduct 448 from 480 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 12:
64 goes into 320 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 7850.046875
Subtract 320 from 320 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.

Moving on to step 13:
64 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: 7850.046875
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 14:
64 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: 7850.046875
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.

Our division results in 7850.046875 with a remaining 0.0.