We look at the division of 72060252 by 64 
The aim is to understand the frequency of 64 in 72060252.

On to step 1:
64 can be fit into 7 0 times, resulting in 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.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 64

Let's proceed to step 2:
72 divided by 64 is 1 with a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 64 from 72, we get 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 64

On to step 3:
When dividing 80 by 64, we get 1 with a remainder of 16.
Write down 1 as next digit of the result. 
Result so far: 11.0
If we take 64 away from 80, we end up with 16.
Take the next digit (6) from the dividend and append it to 16, then repeat: 166 / 64

On to step 4:
64 can be fit into 166 2 times, resulting in a remainder of 38.
Put 2 as the next digit of the answer. 
Result so far: 112.0
If we subtract 128 from 166, we get 38.
Take the next digit (0) from the dividend and append it to 38, then repeat: 380 / 64

Moving on to step 5:
If we divide 380 by 64, we get 5 and a remainder of 60.
Use 5 as the next digit of our solution. 
Result so far: 1125.0
If we subtract 320 from 380, we get 60.
Bring next digit (2) of the dividend behind the 60 and repeat the process: 602 / 64

Going ahead to step 6:
The number 64 fits into 602 9 times, leaving a remainder of 26.
The next digit of our result is 9. 
Result so far: 11259.0
Subtracting 576 from 602 leaves us with 26.
Take the next digit (5) from the dividend and append it to 26, then repeat: 265 / 64

Going ahead to step 7:
The number 64 fits into 265 4 times, leaving a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 112594.0
If we subtract 256 from 265, we get 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 64

Step 8:
If we divide 92 by 64, we get 1 and a remainder of 28.
The number 1 becomes the next digit in our result. 
Result so far: 1125941.0
Subtract 64 from 92 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 9:
If we divide 280 by 64, we get 4 and a remainder of 24.
Record the quotient 4 as the next digit in the result. 
Result so far: 1125941.4
Subtract 256 from 280 to get 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:
The number 64 fits into 240 3 times, leaving a remainder of 48.
The next digit of our result is 3. 
Result so far: 1125941.43
Deduct 192 from 240 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 11:
64 goes into 480 7 times with a remainder of 32.
Put 7 as the next digit of the answer. 
Result so far: 1125941.437
Subtract 448 from 480 to 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.

Advancing to step 12:
If we divide 320 by 64, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 1125941.4375
If we take 320 away from 320, 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.

Step 13:
0 divided by 64 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1125941.4375
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.

Step 14:
64 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1125941.4375
Deduct 0 from 0 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.

After the division, we end up with 1125941.4375 and a remainder of 0.0.