We look at the division of 811965 by 64 
The aim is to understand the frequency of 64 in 811965.

Step 1:
The number 64 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 64

Advancing to step 2:
The number 64 fits into 81 1 times, leaving a remainder of 17.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 64 from 81, we get 17.
Grab the next digit (1) from the dividend, add it to 17, then carry on: 171 / 64

On to step 3:
If we divide 171 by 64, we get 2 and a remainder of 43.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we take 128 away from 171, we end up with 43.
Fetch the next digit (9) from the dividend, attach it to 43 and continue: 439 / 64

Let's proceed to step 4:
64 goes into 439 6 times with a remainder of 55.
The number 6 becomes the next digit in our result. 
Result so far: 126.0
The remainder is 55 after subtracting 384 from 439.
Fetch the next digit (6) from the dividend, attach it to 55 and continue: 556 / 64

Step 5:
64 can be fit into 556 8 times, resulting in a remainder of 44.
Record the quotient 8 as the next digit in the result. 
Result so far: 1268.0
If we take 512 away from 556, we end up with 44.
Bring next digit (5) of the dividend behind the 44 and repeat the process: 445 / 64

Going ahead to step 6:
445 divided by 64 is 6 with a remainder of 61.
Record the quotient 6 as the next digit in the result. 
Result so far: 12686.0
Deduct 384 from 445 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 7:
When dividing 610 by 64, we get 9 with a remainder of 34.
The next digit of our result is 9. 
Result so far: 12686.9
Deduct 576 from 610 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 8:
64 can be fit into 340 5 times, resulting in a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 12686.95
The remainder is 20 after subtracting 320 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
When dividing 200 by 64, we get 3 with a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 12686.953
If we subtract 192 from 200, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
64 goes into 80 1 times with a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 12686.9531
Subtract 64 from 80 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 11:
64 goes into 160 2 times with a remainder of 32.
Use 2 as the next digit of our solution. 
Result so far: 12686.95312
The remainder is 32 after subtracting 128 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 12:
If we divide 320 by 64, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 12686.953125
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.

Moving on to step 13:
The number 64 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 12686.953125
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.

Step 14:
The number 64 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 12686.953125
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 12686.953125, and the remainder is 0.0.