We look at the division of 75451 by 64 
The aim is to understand the frequency of 64 in 75451.

On 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
If we subtract 0 from 7, we get 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 64

Advancing to step 2:
64 can be fit into 75 1 times, resulting in a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 64 from 75, we get 11.
Fetch the next digit (4) from the dividend, attach it to 11 and continue: 114 / 64

On to step 3:
114 divided by 64 is 1 with a remainder of 50.
The next digit of our result is 1. 
Result so far: 11.0
The remainder is 50 after subtracting 64 from 114.
Fetch the next digit (5) from the dividend, attach it to 50 and continue: 505 / 64

Moving on to step 4:
505 divided by 64 is 7 with a remainder of 57.
Write down 7 as next digit of the result. 
Result so far: 117.0
If we take 448 away from 505, we end up with 57.
Bring next digit (1) of the dividend behind the 57 and repeat the process: 571 / 64

Advancing to step 5:
The number 64 fits into 571 8 times, leaving a remainder of 59.
The number 8 becomes the next digit in our result. 
Result so far: 1178.0
Deduct 512 from 571 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 6:
The number 64 fits into 590 9 times, leaving a remainder of 14.
Put 9 as the next digit of the answer. 
Result so far: 1178.9
The remainder is 14 after subtracting 576 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 7:
If we divide 140 by 64, we get 2 and a remainder of 12.
The next digit of our result is 2. 
Result so far: 1178.92
Subtract 128 from 140 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
120 divided by 64 is 1 with a remainder of 56.
Write down 1 as next digit of the result. 
Result so far: 1178.921
Subtracting 64 from 120 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 9:
When dividing 560 by 64, we get 8 with a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 1178.9218
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 10:
480 divided by 64 is 7 with a remainder of 32.
The number 7 becomes the next digit in our result. 
Result so far: 1178.92187
Subtracting 448 from 480 leaves us 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.

On to step 11:
The number 64 fits into 320 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 1178.921875
Subtracting 320 from 320 leaves us 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.

Step 12:
When dividing 0 by 64, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1178.921875
Subtracting 0 from 0 leaves us 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.

Going ahead to step 13:
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: 1178.921875
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 outcome is 1178.921875, with a leftover of 0.0.