We look at the division of 7726390 by 64 
The aim is to understand the frequency of 64 in 7726390.

Advancing to step 1:
If we divide 7 by 64, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 64

On to step 2:
64 goes into 77 1 times with a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 64 from 77 and we're left with 13.
Bring next digit (2) of the dividend behind the 13 and repeat the process: 132 / 64

Step 3:
If we divide 132 by 64, we get 2 and a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 12.0
The remainder is 4 after subtracting 128 from 132.
Append the next digit (6) from the dividend to 4 and continue with: 46 / 64

Moving on to step 4:
46 divided by 64 is 0 with a remainder of 46.
The next digit of our result is 0. 
Result so far: 120.0
Deduct 0 from 46 and we're left with 46.
Include the next digit (3) from the dividend after 46, then repeat: 463 / 64

Advancing to step 5:
If we divide 463 by 64, we get 7 and a remainder of 15.
Use 7 as the next digit of our solution. 
Result so far: 1207.0
Subtract 448 from 463 to get 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 64

Step 6:
159 divided by 64 is 2 with a remainder of 31.
Write down 2 as next digit of the result. 
Result so far: 12072.0
If we subtract 128 from 159, we get 31.
Fetch the next digit (0) from the dividend, attach it to 31 and continue: 310 / 64

Going ahead to step 7:
64 goes into 310 4 times with a remainder of 54.
Record the quotient 4 as the next digit in the result. 
Result so far: 120724.0
Subtracting 256 from 310 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 8:
When dividing 540 by 64, we get 8 with a remainder of 28.
Write down 8 as next digit of the result. 
Result so far: 120724.8
Deduct 512 from 540 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 9:
64 goes into 280 4 times with a remainder of 24.
The next digit of our result is 4. 
Result so far: 120724.84
Subtracting 256 from 280 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 10:
If we divide 240 by 64, we get 3 and a remainder of 48.
Put 3 as the next digit of the answer. 
Result so far: 120724.843
Subtract 192 from 240 to 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:
If we divide 480 by 64, we get 7 and a remainder of 32.
The next digit of our result is 7. 
Result so far: 120724.8437
The remainder is 32 after subtracting 448 from 480.
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 12:
64 can be fit into 320 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 120724.84375
If we subtract 320 from 320, we 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 13:
If we divide 0 by 64, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 120724.84375
If we subtract 0 from 0, we 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.

On to step 14:
64 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 120724.84375
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.

The quotient of the division is 120724.84375, and the remainder is 0.0.