Let's divide 6174912 by 640
The aim is to understand the frequency of 640 in 6174912.

Step 1:
640 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 640

Moving on to step 2:
When dividing 61 by 640, we get 0 with a remainder of 61.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 61 and we're left with 61.
Fetch the next digit (7) from the dividend, attach it to 61 and continue: 617 / 640

On to step 3:
640 goes into 617 0 times with a remainder of 617.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 617 and we're left with 617.
Append the next digit (4) from the dividend to 617 and continue with: 6174 / 640

Step 4:
640 goes into 6174 9 times with a remainder of 414.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 5760 from 6174 to get 414.
Fetch the next digit (9) from the dividend, attach it to 414 and continue: 4149 / 640

On to step 5:
640 goes into 4149 6 times with a remainder of 309.
Write down 6 as next digit of the result. 
Result so far: 96.0
The remainder is 309 after subtracting 3840 from 4149.
Include the next digit (1) from the dividend after 309, then repeat: 3091 / 640

Advancing to step 6:
640 can be fit into 3091 4 times, resulting in a remainder of 531.
Use 4 as the next digit of our solution. 
Result so far: 964.0
Subtracting 2560 from 3091 leaves us with 531.
Bring next digit (2) of the dividend behind the 531 and repeat the process: 5312 / 640

Going ahead to step 7:
If we divide 5312 by 640, we get 8 and a remainder of 192.
Record the quotient 8 as the next digit in the result. 
Result so far: 9648.0
If we take 5120 away from 5312, we end up with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Let's proceed to step 8:
The number 640 fits into 1920 3 times, leaving a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 9648.3
Deduct 1920 from 1920 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.

Advancing to step 9:
When dividing 0 by 640, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 9648.3
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.

Advancing to step 10:
640 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: 9648.3
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 result is 9648.3 with a remainder of 0.0.