We look at the division of 640912 by 64 
The aim is to understand the frequency of 64 in 640912.

Let's proceed to step 1:
If we divide 6 by 64, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 64

On to step 2:
If we divide 64 by 64, we get 1 and a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 64 from 64 and we're left with 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 64

Moving on to step 3:
When dividing 0 by 64, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 0, we end up with 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 64

Going ahead to step 4:
When dividing 9 by 64, we get 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 100.0
Subtract 0 from 9 to get 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 64

Advancing to step 5:
64 can be fit into 91 1 times, resulting in a remainder of 27.
Put 1 as the next digit of the answer. 
Result so far: 1001.0
The remainder is 27 after subtracting 64 from 91.
Grab the next digit (2) from the dividend, add it to 27, then carry on: 272 / 64

Let's proceed to step 6:
When dividing 272 by 64, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 10014.0
Subtracting 256 from 272 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 7:
The number 64 fits into 160 2 times, leaving a remainder of 32.
Record the quotient 2 as the next digit in the result. 
Result so far: 10014.2
If we subtract 128 from 160, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 8:
64 goes into 320 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 10014.25
Deduct 320 from 320 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:
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: 10014.25
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.

Let's proceed to step 10:
If we divide 0 by 64, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 10014.25
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.

After the division, we end up with 10014.25 and a remainder of 0.0.